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Use onclick on a button to start javascript

Hi there I'm pretty new to using functions and onclick actions to call javascript so I could do with some help. Basically, I've installed a plugin on WordPress which adds a button to the page in the form of a widget and once clicked it starts a script. However, I don't like their button so I'm trying to code my own but I want it to start the script like there's.
Here's the script code:
/*
* Timely BookButton plugin
* Example usage:
* var button = new timelyButton('doedayspa');
*
* Booking process can be kicked off manually by calling the start method on the button instance e.g.
* button.start();
*
*/
// Need this for legacy support of older versions of the BookingButton
var timelyButton;
(function () {
"use strict";
var context = window;
var mobile = {
Android: function () {
return navigator.userAgent.match(/Android/i) ? true : false;
},
BlackBerry: function () {
return navigator.userAgent.match(/BlackBerry/i) ? true : false;
},
iOS: function () {
return navigator.userAgent.match(/iPhone|iPod/i) ? true : false;
},
Windows: function () {
return navigator.userAgent.match(/IEMobile/i) ? true : false;
},
any: function () {
return (mobile.Android() || mobile.BlackBerry() || mobile.iOS() || mobile.Windows());
}
};
timelyButton = function (id, opts) {
var options = opts || {};
var businessId = id;
var resellerCode = options.reseller || resellerCode || '';
var productId = options.product || productId || '';
var categoryId = options.category || categoryId || '';
var staffId = options.staff || staffId || '';
var locationId = options.location || locationId || '';
var giftVoucherId = options.giftVoucherId || giftVoucherId || '';
var isPurchaseButton = options.isPurchaseButton != null ? options.isPurchaseButton : false; // default not a purchase
var dontCreateButton = !!options.dontCreateButton;
window.timelyBookFrame = {};
var XD;
var style = options.style || 'light';
var buttonId = options.buttonId || false;
var bookButton;
var scriptSource = (function() {
var script = document.getElementById('timelyScript');
if (script.getAttribute.length !== undefined) {
return script.src;
}
return script.getAttribute('src', -1);
}());
var isOwnImage = !!options.imgSrc;
var imgButtonType = isPurchaseButton ? "purchase-buttons" : "book-buttons";
var imgSrc = options.imgSrc || getDomain() + '/images/' + imgButtonType + '/button_' + style + '#2x.png';
var hoverSrc = getDomain() + '/images/' + imgButtonType + '/button_' + style + '_hover#2x.png';
var activeSrc = getDomain() + '/images/' + imgButtonType + '/button_' + style + '_active#2x.png';
var locationUrl = (isPurchaseButton ? '/giftvoucher/details/' : '/booking/location/') + businessId;
function init() {
if (dontCreateButton) return true;
if (isOwnImage) {
bookButton = document.createElement('a');
bookButton.href = 'javascript:void(0)';
bookButton.onclick = eventHandler.prototype.Book;
bookButton.innerHTML = '<img src=\'' + imgSrc + '\' border=\'0\' />';
} else {
bookButton = document.createElement('a');
bookButton.style.backgroundImage = "url(" + imgSrc + ")";
bookButton.style.backgroundRepeat = "no-repeat";
bookButton.style.backgroundPosition = "0px 0px";
bookButton.style.backgroundSize = (isPurchaseButton ? "220px" : "162px") + " 40px";
bookButton.style.width = isPurchaseButton ? "220px" : "162px";
bookButton.style.height = "40px";
bookButton.style.display = "inline-block";
bookButton.href = 'javascript:void(0)';
bookButton.onclick = eventHandler.prototype.Book;
bookButton.innerHTML += '<img src="' + hoverSrc + '" style="display:none;" border=\'0\' />';
bookButton.innerHTML += '<img src="' + activeSrc + '" style="display:none;" border=\'0\' />';
bookButton.onmouseenter = function() { this.style.backgroundImage = "url(" + hoverSrc + ")"; };
bookButton.onmouseout = function () { this.style.backgroundImage = "url(" + imgSrc + ")"; };
bookButton.onmousedown = function () { this.style.backgroundImage = "url(" + activeSrc + ")"; };
bookButton.onmouseup = function () { this.style.backgroundImage = "url(" + hoverSrc + ")"; };
}
var insertionPoint = findInsertionPoint(buttonId);
insertAfter(bookButton, insertionPoint);
}
function findInsertionPoint(buttonId) {
var insertionPoint = false;
if (buttonId) {
insertionPoint = document.getElementById(buttonId);
} else {
if (("currentScript" in document)) {
insertionPoint = document.currentScript;
} else {
var scripts = document.getElementsByTagName('script');
insertionPoint = scripts[scripts.length - 1];
}
}
return insertionPoint;
}
function getDomain() {
return ('https:' == document.location.protocol ? 'https://' : 'http://') + scriptSource.match( /:\/\/(.[^/]+)/ )[1];
}
function startBooking() {
var url = "";
if (resellerCode) {
url += '&reseller=' + resellerCode;
}
if (productId) {
url += '&productId=' + productId;
}
if (categoryId) {
url += '&categoryId=' + categoryId;
}
if (staffId) {
url += '&staffId=' + staffId;
}
if (locationId) {
url += '&locationId=' + locationId;
}
if (giftVoucherId) {
url += '&giftVoucherId=' + giftVoucherId;
}
if (window.innerWidth < 768 || mobile.any()) {
url = getDomain() + locationUrl + "?mobile=true" + url;
window.location.href = url;
return;
}
window.timelyBookFrame = document.createElement('iframe');
window.timelyBookFrame.className = 'timely-book-frame';
window.timelyBookFrame.style.cssText = 'width: 100%; height: 100%; position: fixed; top: 0; left: 0; z-index: 99999999;';
window.timelyBookFrame.setAttribute('frameBorder', 0);
window.timelyBookFrame.setAttribute('allowTransparency', 'true');
url = getDomain() + (isPurchaseButton ? '/giftvoucher' : '/booking') + '/overlay/' + businessId + '?x' + url;
url += '#' + encodeURIComponent(document.location.href);
window.timelyBookFrame.src = url;
window.timelyBookFrame.style.display = 'none';
document.getElementsByTagName('body')[0].appendChild(window.timelyBookFrame);
var element = document.getElementById('timely-lightbox');
if (typeof(element) != 'undefined' && element != null) {
$('#timely-lightbox').fadeOut();
}
}
function insertAfter(f, n) {
var p = n.parentNode;
if (n.nextSibling) {
p.insertBefore(f, n.nextSibling);
} else {
p.appendChild(f);
}
}
function eventHandler() {
// prototype instance
}
eventHandler.prototype.Book = function() {
startBooking();
};
// everything is wrapped in the XD function to reduce namespace collisions
XD = function () {
var interval_id,
last_hash,
cache_bust = 1,
attached_callback,
window = context;
return {
postMessage: function (message, target_url, target) {
if (!target_url) {
return;
}
target = target || parent; // default to parent
if (window['postMessage']) {
// the browser supports window.postMessage, so call it with a targetOrigin
// set appropriately, based on the target_url parameter.
target['postMessage'](message, target_url.replace(/([^:]+:\/\/[^\/]+).*/, '$1'));
} else if (target_url) {
// the browser does not support window.postMessage, so use the window.location.hash fragment hack
target.location = target_url.replace(/#.*$/, '') + '#' + (+new Date) + (cache_bust++) + '&' + message;
}
},
receiveMessage: function (callback, source_origin) {
// browser supports window.postMessage
if (window['postMessage']) {
// bind the callback to the actual event associated with window.postMessage
if (callback) {
attached_callback = function (e) {
if ((typeof source_origin === 'string' && e.origin !== source_origin)
|| (Object.prototype.toString.call(source_origin) === "[object Function]" && source_origin(e.origin) === !1)) {
return !1;
}
callback(e);
};
}
if (window['addEventListener']) {
window[callback ? 'addEventListener' : 'removeEventListener']('message', attached_callback, !1);
} else {
window[callback ? 'attachEvent' : 'detachEvent']('onmessage', attached_callback);
}
} else {
// a polling loop is started & callback is called whenever the location.hash changes
interval_id && clearInterval(interval_id);
interval_id = null;
if (callback) {
interval_id = setInterval(function () {
var hash = document.location.hash,
re = /^#?\d+&/;
if (hash !== last_hash && re.test(hash)) {
last_hash = hash;
callback({ data: hash.replace(re, '') });
}
}, 100);
}
}
}
};
}();
// setup a callback to handle the dispatched MessageEvent. if window.postMessage is supported the passed
// event will have .data, .origin and .source properties. otherwise, it will only have the .data property.
XD.receiveMessage(function (message) {
if (message.data == 'close') {
var element = document.getElementById('timely-lightbox');
if (typeof (element) != 'undefined' && element != null) {
$('#timely-lightbox').show();
}
if (window.timelyBookFrame && window.timelyBookFrame.parentNode) window.timelyBookFrame.parentNode.removeChild(window.timelyBookFrame);
}
if (message.data == 'open' && window.timelyBookFrame) {
window.timelyBookFrame.style.display = 'block';
}
}, getDomain());
init();
// expose the BookButton API
return {
start: function() {
startBooking();
}
};
};
})();
So how can I run this javascript when I click the button?
Any help would be greatly appreciated!

You could create a script tag automatically if the button has been clicked.
document.getElementById('myButton').addEventListener('click', () => {
const script = document.createElement("script");
script.src = 'my-other-file.js';
document.head.appendChild(script);
})
<button id="myButton">Load JS File</button>

Data not binding as it should be after calling ajax with knockoutjs

I have this grid that i am creating using knockoutjs, it works perfectly at first, now i am using a window.location.hash to run another query, it works too and query returns the correct amount of data however when i insert it within the observableArray (which gets inserted correctly as well), the grid doesn't update the data and shows the old data... I'm using removeAll() function on the observableArray as well before inserting new set of data but it wont update my grid, i suspect there is something wrong with the DOM?
I should mention when i reload the page (since the page's url keeps the hash for query) my grid shows the data and works perfectly. for some reason it needs to reload the page and doesn't work without,
Here is my JS:
if (!ilia) var ilia = {};
ilia.models = function () {
var self = this;
this.pageCount = ko.observable(0);
//this is the observableArray that i am talking about ++++++++
this.items = ko.observableArray();
var $pagination = null;
var paginationConfig = {
startPage: 1,
totalPages: 20,
onPageClick: function (evt, page) {
self.generateHash({ pageNum: page });
self.getData();
}
}
var hashDefault = {
pageNum: 1,
pageSize: 20,
catId: null,
search: ""
}
this.dataModel = function (_id, _name, _desc, _thumb, _ext) {
var that = this;
this.Id = ko.observable(_id);
this.Name = ko.observable(_name);
this.Desc = ko.observable(_desc);
this.Url = '/site/ModelDetail?id=' + _id;
var b64 = "data:image/" + _ext + ";base64, ";
this.thumb = ko.observable(b64 + _thumb);
}
this.generateHash = function (opt) {
//debugger;
var props = $.extend(hashDefault, opt);
var jso = JSON.stringify(props);
var hash = window.location.hash;
var newHash = window.location.href.replace(hash, "") + "#" + jso;
window.location.href = newHash;
return jso;
}
this.parseHash = function () {
var hash = window.location.hash.replace("#", "");
var data = JSON.parse(hash);
if (data)
data = $.extend(hashDefault, data);
else
data = hashDefault;
return data;
}
var _cntrl = function () {
var _hdnCatName = null;
this.hdnCatName = function () {
if (_hdnCatName == null)
_hdnCatName = $("hdnCatName");
return _hdnCatName();
};
var _grid = null;
this.grid = function () {
if (_grid == null || !_grid)
_grid = $("#grid");
return _grid;
}
this.rowTemplate = function () {
return $($("#rowTemplate").html());
}
}
this.createPagnation = function (pageCount, pageNum) {
$pagination = $('#pagination-models');
if ($pagination && $pagination.length > 0)
if (paginationConfig.totalPages == pageCount) return;
var currentPage = $pagination.twbsPagination('getCurrentPage');
var opts = $.extend(paginationConfig, {
startPage: pageNum > pageCount ? pageCount : pageNum,
totalPages: pageCount,
onPageClick: self.pageChange
});
$pagination.twbsPagination('destroy');
$pagination.twbsPagination(opts);
}
this.pageChange = function (evt, page) {
var hash = self.parseHash();
if (hash.pageNum != page) {
self.generateHash({ pageNum: page });
self.getData();
}
}
this.getData = function () {
var _hash = self.parseHash();
inputObj = {
pageNum: _hash.pageNum,
pageSize: _hash.pageSize,
categoryId: _hash.catId
}
//debugger;
//console.log(_hash);
if (inputObj.categoryId == null) {
ilia.business.models.getAll(inputObj, function (d) {
//debugger;
if (d && d.IsSuccessfull) {
self.pageCount(d.PageCount);
self.items.removeAll();
_.each(d.Result, function (item) {
self.items.push(new self.dataModel(item.ID, item.Name, item.Description, item.Thumb, item.Extention));
});
if (self.pageCount() > 0)
self.createPagnation(self.pageCount(), inputObj.pageNum);
}
});
}
else {
ilia.business.models.getAllByCatId(inputObj, function (d) {
if (d && d.IsSuccessfull) {
self.pageCount(d.PageCount);
self.items.removeAll();
console.log(self.items());
_.each(d.Result, function (item) {
self.items.push(new self.dataModel(item.ID, item.Name, item.Description, item.Thumb, item.Extention));
});
// initializing the paginator
if (self.pageCount() > 0)
self.createPagnation(self.pageCount(), inputObj.pageNum);
//console.log(d.Result);
}
});
}
}
this.cntrl = new _cntrl();
};
And Initialize:
ilia.models.inst = new ilia.models();
$(document).ready(function () {
if (!window.location.hash) {
ilia.models.inst.generateHash();
$(window).on('hashchange', function () {
ilia.models.inst.getData();
});
}
else {
var obj = ilia.models.inst.parseHash();
ilia.models.inst.generateHash(obj);
$(window).on('hashchange', function () {
ilia.models.inst.getData();
});
}
ko.applyBindings(ilia.models.inst, document.getElementById("grid_area"));
//ilia.models.inst.getData();
});

Would perhaps be useful to see the HTML binding here as well.
Are there any console errors? Are you sure the new data received isn't the old data, due to some server-side caching etc?
Anyhow, if not any of those:
Are you using deferred updates? If the array size doesn't change, I've seen KO not being able to track the properties of a nested viewmodel, meaning that if the array size haven't changed then it may very well be that it ignores notifying subscribers. You could solve that with
self.items.removeAll();
ko.tasks.runEarly();
//here's the loop
If the solution above doesn't work, could perhaps observable.valueHasMutated() be of use? https://forums.asp.net/t/2056128.aspx?What+is+the+use+of+valueHasMutated+in+Knockout+js

How to create a plugin to add attachment or file in rich text editor of Adobe CQ 5?

I need help in creating a plugin for rich text editor in Adobe cq 5 to add an image, pdf, video, ppt or any file into rich text editor.
The existing rte plugins that are available are findreplace, undo, spellcheck, table etc
How to create a plugin to add a file to rich text editor?
The plugins are an ext js files. Appreciate if any one can suggest answer. It will be of great help.
Thanks

I added a custom drop down into my RTE. It was used to add values to the editor on selecting values from it. I think this might help you solve your issue because similarly you can create your required plugin.
Please refer comments next to the methods for your reference.
/**
* Placeholder Plugin
*/
var keyvalueEnteries = [];
var newText;
var doc;
var range
CUI.rte.plugins.PlaceholderPlugin = new Class({
toString: "PlaceholderPlugin",
extend: CUI.rte.plugins.Plugin,
/**
* #private
*/
cachedFormats: null,
/**
* #private
*/
formatUI: null,
getFeatures: function() {
return [ "Myparaformat" ];
},
/**
* #private
*
*/
getKeys: function() {
var com = CUI.rte.Common;
if (this.cachedFormats == null) {
this.cachedFormats = this.config.formats || { };
com.removeJcrData(this.cachedFormats);
this.cachedFormats = com.toArray(this.cachedFormats, "tag", "description");
}
return this.cachedFormats;
},
initializeUI: function(tbGenerator) {
var plg = CUI.rte.plugins;
var ui = CUI.rte.ui;
if (this.isFeatureEnabled("placeHolder")) {
this.formatUI = tbGenerator.createParaFormatter("placeHolder", this,null,this.getKeys());
tbGenerator.addElement("placeHolder", plg.Plugin.SORT_PARAFORMAT, this.formatUI,
10);
}
},
notifyPluginConfig: function(pluginConfig) { //This function gets executed once on load of RTE for the first time
var url = pluginConfig.sourceURL;
keyvalueEnteries = CQ.HTTP.eval(url);
keyvalueEnteries = JSON.stringify(keyvalueEnteries);
if(keyvalueEnteries == undefined){
keyvalueEnteries = '[{"key":"","value":"None"}]';
}
pluginConfig = pluginConfig || { };
//creating JSON sttructure
var placeholderJSON = '{"formats":' + keyvalueEnteries + '}';
var placeHolderVals = eval('(' + placeholderJSON + ')');
var defaults = placeHolderVals;
if (pluginConfig.formats) {
delete defaults.formats;
}
CUI.rte.Utils.applyDefaults(pluginConfig, defaults);
this.config = pluginConfig;
},
execute: function(cmd) { // This function gets executed when there is change in the state of custom plugin/drop down
if (this.formatUI) {
var formatId = this.formatUI.getSelectedFormat();
if (formatId && range != undefined) {
var placeholderElement = "";
if(formatId == 'none' && range.collapsed == false){//checks if None is selected in placeholder and the text is selected
range.deleteContents();
}else if(formatId != 'none'){
placeholderElement = document.createTextNode(" ${" + formatId + "} ");
range.insertNode(placeholderElement); //INSERTS PLACEHOLDER AT CURRENT CARET LOCATION
range.setStartAfter(placeholderElement);//INSERTS CURSOR AT THE END OF CURRENT PLACEHOLDER IF PLACEHOLDER IS SELECTED AGAIN
}
}
}
},
updateState: function(selDef) { // This function gets executed on click on the editor space in RTE
doc = selDef.editContext.doc; //GET THE DOCUMENT INSIDE THE IFRAME
range = doc.getSelection().getRangeAt(0); //GETS CURRENT CARET POSITION
}
});
//register plugin
CUI.rte.plugins.PluginRegistry.register("placeholder",
CUI.rte.plugins.PlaceholderPlugin);
CUI.rte.ui.ext.ParaFormatterImpl = new Class({
toString: "ParaFormatterImpl",
extend: CUI.rte.ui.TbParaFormatter,
// Interface implementation ------------------------------------------------------------
addToToolbar: function(toolbar) {
var com = CUI.rte.Common;
this.toolbar = toolbar;
if (com.ua.isIE) {
// the regular way doesn't work for IE anymore with Ext 3.1.1, hence working
// around
var helperDom = document.createElement("span");
helperDom.innerHTML = "<select class=\"x-placeholder-select\">"
+ this.createFormatOptions() + "</select>";
this.formatSelector = CQ.Ext.get(helperDom.childNodes[0]);
} else {
this.formatSelector = CQ.Ext.get(CQ.Ext.DomHelper.createDom({
tag: "select",
cls: "x-placeholder-select",
html: this.createFormatOptions()
}));
}
this.initializeSelector();
toolbar.add(
CQ.I18n.getMessage("Placeholder"), // Type the name you want to appear in RTE for the custom plugin /drop down
" ",
this.formatSelector.dom);
},
/**
* Creates HTML code for rendering the options of the format selector.
* #return {String} HTML code containing the options of the format selector
* #private
*/
createFormatOptions: function() {
var htmlCode = "";
if (this.formats) {
var formatCnt = this.formats.length;
htmlCode += "<option value='none'>None</option>";
for (var f = 0; f < formatCnt; f++) {
var text = this.formats[f].text;
htmlCode += "<option value=\"" + this.formats[f].value + "\">" + text
+ "</option>";
}
}
return htmlCode;
},
createToolbarDef: function() {
return {
"xtype": "panel",
"itemId": this.id,
"html": "<select class=\"x-placeholder-select\">"
+ this.createFormatOptions() + "</select>",
"listeners": {
"afterrender": function() {
var item = this.toolbar.items.get(this.id);
if (item && item.body) {
this.formatSelector = CQ.Ext.get(item.body.dom.childNodes[0]);
this.initializeSelector();
}
},
"scope": this
}
};
},
initializeSelector: function() {
this.formatSelector.on('change', function() {
var format = this.formatSelector.dom.value;
if (format.length > 0) {
this.plugin.execute(this.id);
}
}, this);
this.formatSelector.on('focus', function() {
this.plugin.editorKernel.isTemporaryBlur = true;
}, this);
// fix for a Firefox problem that adjusts the combobox' height to the height
// of the largest entry
this.formatSelector.setHeight(20);
},
getSelectorDom: function() {
return this.formatSelector.dom;
},
getSelectedFormat: function() {
var format;
if (this.formatSelector) {
format = this.formatSelector.dom.value;
if (format.length > 0) {
return format;
}
} else {
var item = this.toolbar.items.get(this.id);
if (item.getValue()) {
return item;
}
}
return null;
},
selectFormat: function(formatToSelect, auxRoot, formatCnt, noFormatCnt) {
var indexToSelect = -1;
var selectorDom = this.formatSelector.dom;
if ((formatToSelect != null) && (formatCnt == 1) && (noFormatCnt == 0)) {
var options = selectorDom.options;
for (var optIndex = 0; optIndex < options.length; optIndex++) {
var optionToCheck = options[optIndex];
if (optionToCheck.value == formatToSelect) {
indexToSelect = optIndex;
break;
}
}
}
selectorDom.disabled = (noFormatCnt > 0) && (auxRoot == null);
selectorDom.selectedIndex = indexToSelect;
}
});

How to select all images in the page?

I have this jQuery-script that gives any image or object with tag data-retina="true" a retina-resolution-image or background-image.
But how do I remove the last part from the script so that this function will apply on every image, not just the one with the data-retina tag?
(function($) {
"use strict";
var retinaReplace = function(element, options) {
this.options = options;
var $el = $(element);
var is_image = $el.is('img');
var normal_url = is_image ? $el.attr('src') : $el.backgroundImageUrl();
var retina_url = this.options.generateUrl($el, normal_url);
$('<img/>').attr('src', retina_url).load(function() {
if (is_image) {
$el.attr('src', $(this).attr('src'));
} else {
$el.backgroundImageUrl($(this).attr('src'));
$el.backgroundSize($(this)[0].width, $(this)[0].height);
}
$el.attr('data-retina', 'complete');
});
}
retinaReplace.prototype = {
constructor: retinaReplace
}
$.fn.retinaReplace = function(option) {
if (getDevicePixelRatio() <= 1) { return this; }
return this.each(function() {
var $this = $(this);
var data = $this.data('retinaReplace');
var options = $.extend({}, $.fn.retinaReplace.defaults, $this.data(), typeof option == 'object' && option);
if (!data) { $this.data('retinaReplace', (data = new retinaReplace(this, options))); }
if (typeof option == 'string') { data[option](); }
});
}
$.fn.retinaReplace.defaults = {
suffix: '-x2',
generateUrl: function(element, url) {
var dot_index = url.lastIndexOf('.');
var extension = url.substr(dot_index + 1);
var file = url.substr(0, dot_index);
return file + this.suffix + '.' + extension;
}
}
$.fn.retinaReplace.Constructor = retinaReplace;
var getDevicePixelRatio = function() {
if (window.devicePixelRatio === undefined) { return 1; }
return window.devicePixelRatio;
}
$.fn.backgroundImageUrl = function(url) {
return url ? this.each(function () {
$(this).css("background-image", 'url("' + url + '")')
}) : $(this).css("background-image").replace(/url\(|\)|"|'/g, "");
}
$.fn.backgroundSize = function(retinaWidth, retinaHeight) {
var sizeValue = Math.floor(retinaWidth/2) + 'px ' + Math.floor(retinaHeight/2) + 'px';
$(this).css("background-size", sizeValue);
$(this).css("-webkit-background-size", sizeValue);
}
$(function(){
$("[data-retina='true']").retinaReplace();
});
})(window.jQuery);

how do I remove the last part from the script so that this function will apply on every image, not just the once with the data-retina-tag?
Change:
$(function(){
$("[data-retina='true']").retinaReplace();
});
To:
$(function(){
$("img").retinaReplace();
});

restricting input tags to maximum 5

I have got following jquery tags plugin.
I want to to restrict maxmimum 5 tags, so that user can not enter more than 5 words (separated by spaces).
Can someone please help me doing it?
Thanks.. Following is original plugin code:
(function($) {
var delimiter = new Array();
jQuery.fn.addTag = function(value,options) {
var options = jQuery.extend({focus:false},options);
this.each(function() {
id = $(this).attr('id');
var tagslist = $(this).val().split(delimiter[id]);
if (tagslist[0] == '') {
tagslist = new Array();
}
value = jQuery.trim(value);
if (value !='') {
$('<span class="tag">'+value + ' x</span>').insertBefore('#'+id+'_addTag');
tagslist.push(value);
$('#'+id+'_tag').val('');
if (options.focus) {
$('#'+id+'_tag').focus();
} else {
$('#'+id+'_tag').blur();
}
}
jQuery.fn.tagsInput.updateTagsField(this,tagslist);
});
return false;
};
jQuery.fn.removeTag = function(value) {
this.each(function() {
id = $(this).attr('id');
var old = $(this).val().split(delimiter[id]);
$('#'+id+'_tagsinput .tag').remove();
str = '';
for (i=0; i< old.length; i++) {
if (escape(old[i])!=value) {
str = str + delimiter[id] +old[i];
}
}
jQuery.fn.tagsInput.importTags(this,str);
});
return false;
};
jQuery.fn.tagsInput = function(options) {
var settings = jQuery.extend({defaultText:'add a tag',width:'300px',height:'100px','hide':true,'delimiter':',',autocomplete:{selectFirst:false}},options);
this.each(function() {
if (settings.hide) {
$(this).hide();
}
id = $(this).attr('id')
data = jQuery.extend({
pid:id,
real_input: '#'+id,
holder: '#'+id+'_tagsinput',
input_wrapper: '#'+id+'_addTag',
fake_input: '#'+id+'_tag',
},settings);
delimiter[id] = data.delimiter;
$('<div id="'+id+'_tagsinput" class="tagsinput"><div id="'+id+'_addTag"><input id="'+id+'_tag" value="" default="'+settings.defaultText+'" /></div><div class="tags_clear"></div></div>').insertAfter(this);
$(data.holder).css('width',settings.width);
$(data.holder).css('height',settings.height);
if ($(data.real_input).val()!='') {
jQuery.fn.tagsInput.importTags($(data.real_input),$(data.real_input).val());
} else {
$(data.fake_input).val($(data.fake_input).attr('default'));
$(data.fake_input).css('color','#666666');
}
$(data.holder).bind('click',data,function(event) {
$(event.data.fake_input).focus();
});
// if user types a comma, create a new tag
$(data.fake_input).bind('keypress',data,function(event) {
if (event.which==event.data.delimiter.charCodeAt(0) || event.which==13) {
$(event.data.real_input).addTag($(event.data.fake_input).val(),{focus:true});
return false;
}
});
$(data.fake_input).bind('focus',data,function(event) {
if ($(event.data.fake_input).val()==$(event.data.fake_input).attr('default')) {
$(event.data.fake_input).val('');
}
$(event.data.fake_input).css('color','#000000');
});
if (settings.autocomplete_url != undefined) {
$(data.fake_input).autocomplete(settings.autocomplete_url,settings.autocomplete).bind('result',data,function(event,data,formatted) {
if (data) {
d = data + "";
$(event.data.real_input).addTag(d,{focus:true});
}
});;
$(data.fake_input).bind('blur',data,function(event) {
if ($(event.data.fake_input).val() != $(event.data.fake_input).attr('default')) {
$(event.data.real_input).addTag($(event.data.fake_input).val(),{focus:false});
}
$(event.data.fake_input).val($(event.data.fake_input).attr('default'));
$(event.data.fake_input).css('color','#666666');
return false;
});
} else {
// if a user tabs out of the field, create a new tag
// this is only available if autocomplete is not used.
$(data.fake_input).bind('blur',data,function(event) {
var d = $(this).attr('default');
if ($(event.data.fake_input).val()!='' && $(event.data.fake_input).val()!=d) {
event.preventDefault();
$(event.data.real_input).addTag($(event.data.fake_input).val(),{focus:true});
} else {
$(event.data.fake_input).val($(event.data.fake_input).attr('default'));
$(event.data.fake_input).css('color','#666666');
}
return false;
});
}
$(data.fake_input).blur();
});
return this;
};
jQuery.fn.tagsInput.updateTagsField = function(obj,tagslist) {
id = $(obj).attr('id');
$(obj).val(tagslist.join(delimiter[id]));
};
jQuery.fn.tagsInput.importTags = function(obj,val) {
$(obj).val('');
id = $(obj).attr('id');
var tags = val.split(delimiter[id]);
for (i=0; i<tags.length; i++) {
$(obj).addTag(tags[i],{focus:false});
}
};
})(jQuery);

best way is to count the number of "tag" classes already added, and then you can handle it differently, for example you can prevent showing the "add a tag" input once 5 tags inserted by defining maxTags and updating jQuery.fn.addTag and jQuery.fn.removeTag :
/*
jQuery Tags Input Plugin 1.0
Copyright (c) 2010 XOXCO, Inc
Documentation for this plugin lives here:
http://xoxco.com/clickable/jquery-tags-input
Licensed under the MIT license:
http://www.opensource.org/licenses/mit-license.php
ben#xoxco.com
*/
(function($) {
var delimiter = new Array();
var maxTags = 5;
jQuery.fn.addTag = function(value,options) {
var options = jQuery.extend({focus:false},options);
this.each(function() {
id = $(this).attr('id');
var tagslist = $(this).val().split(delimiter[id]);
if (tagslist[0] == '') {
tagslist = new Array();
}
value = jQuery.trim(value);
if (value !='') {
$('<span class="tag">'+value + ' x</span>').insertBefore('#'+id+'_addTag');
tagslist.push(value);
$('#'+id+'_tag').val('');
if (options.focus) {
$('#'+id+'_tag').focus();
} else {
$('#'+id+'_tag').blur();
}
}
jQuery.fn.tagsInput.updateTagsField(this,tagslist);
});
if($(".tag").length>maxTags-1){$('#'+id+'_addTag').hide()}
return false;
};
jQuery.fn.removeTag = function(value) {
this.each(function() {
id = $(this).attr('id');
var old = $(this).val().split(delimiter[id]);
$('#'+id+'_tagsinput .tag').remove();
str = '';
for (i=0; i< old.length; i++) {
if (escape(old[i])!=value) {
str = str + delimiter[id] +old[i];
}
}
jQuery.fn.tagsInput.importTags(this,str);
});
if($(".tag").length<maxTags){$('#'+id+'_addTag').show()}
return false;
};
jQuery.fn.tagsInput = function(options) {
var settings = jQuery.extend({defaultText:'add a tag',width:'300px',height:'100px','hide':true,'delimiter':',',autocomplete:{selectFirst:false}},options);
this.each(function() {
if (settings.hide) {
$(this).hide();
}
id = $(this).attr('id')
data = jQuery.extend({
pid:id,
real_input: '#'+id,
holder: '#'+id+'_tagsinput',
input_wrapper: '#'+id+'_addTag',
fake_input: '#'+id+'_tag',
},settings);
delimiter[id] = data.delimiter;
$('<div id="'+id+'_tagsinput" class="tagsinput"><div id="'+id+'_addTag"><input id="'+id+'_tag" value="" default="'+settings.defaultText+'" /></div><div class="tags_clear"></div></div>').insertAfter(this);
$(data.holder).css('width',settings.width);
$(data.holder).css('height',settings.height);
if ($(data.real_input).val()!='') {
jQuery.fn.tagsInput.importTags($(data.real_input),$(data.real_input).val());
} else {
$(data.fake_input).val($(data.fake_input).attr('default'));
$(data.fake_input).css('color','#666666');
}
$(data.holder).bind('click',data,function(event) {
$(event.data.fake_input).focus();
});
// if user types a comma, create a new tag
$(data.fake_input).bind('keypress',data,function(event) {
if (event.which==event.data.delimiter.charCodeAt(0) || event.which==13) {
$(event.data.real_input).addTag($(event.data.fake_input).val(),{focus:true});
return false;
}
});
$(data.fake_input).bind('focus',data,function(event) {
if ($(event.data.fake_input).val()==$(event.data.fake_input).attr('default')) {
$(event.data.fake_input).val('');
}
$(event.data.fake_input).css('color','#000000');
});
if (settings.autocomplete_url != undefined) {
$(data.fake_input).autocomplete(settings.autocomplete_url,settings.autocomplete).bind('result',data,function(event,data,formatted) {
if (data) {
d = data + "";
$(event.data.real_input).addTag(d,{focus:true});
}
});;
$(data.fake_input).bind('blur',data,function(event) {
if ($(event.data.fake_input).val() != $(event.data.fake_input).attr('default')) {
$(event.data.real_input).addTag($(event.data.fake_input).val(),{focus:false});
}
$(event.data.fake_input).val($(event.data.fake_input).attr('default'));
$(event.data.fake_input).css('color','#666666');
return false;
});
} else {
// if a user tabs out of the field, create a new tag
// this is only available if autocomplete is not used.
$(data.fake_input).bind('blur',data,function(event) {
var d = $(this).attr('default');
if ($(event.data.fake_input).val()!='' && $(event.data.fake_input).val()!=d) {
event.preventDefault();
$(event.data.real_input).addTag($(event.data.fake_input).val(),{focus:true});
} else {
$(event.data.fake_input).val($(event.data.fake_input).attr('default'));
$(event.data.fake_input).css('color','#666666');
}
return false;
});
}
$(data.fake_input).blur();
});
return this;
};
jQuery.fn.tagsInput.updateTagsField = function(obj,tagslist) {
id = $(obj).attr('id');
$(obj).val(tagslist.join(delimiter[id]));
};
jQuery.fn.tagsInput.importTags = function(obj,val) {
$(obj).val('');
id = $(obj).attr('id');
var tags = val.split(delimiter[id]);
for (i=0; i<tags.length; i++) {
$(obj).addTag(tags[i],{focus:false});
}
};
})(jQuery);

How about adding something like this:
if($('.tag').length>=5){
$('#tags_tag').attr('disabled','true');
}
I put a little more flair into my demo.

Probably the easiest solution is to change line 89 of jquery.tagsinput.js from:
var skipTag = $(tagslist).tagExist(value);
to:
var skipTag = $(tagslist).length > 5 || $(tagslist).tagExist(value);