How can show pop when user typing using javascript? - javascript

I want to create a function for showing pop or status when user typing something in field, I want to do it without submitting form, I have try following function but its not working properly can anyone let me know where the problem..........?
Javascript
<script type="text/javascript">
document.getElementById('confirm').addEventListener('change', checkFile, false);
approveletter.addEventListener('change', checkFile, false);
function checkFile(e) {
if ($('#confirm').val().length > 0) {
alert("txt");
}
}
</script>
HTML
<input type="text" name="text" id="confirm">

Just listen to the onkeyup and onkeydown events. I included a jsfiddle that might help.
jsfiddle

Edit - The Latest Update
Okay, I see you've got your fiddle from Vivek, but you might be interested in this as well. Now I get completely what you want to achieve, and here's a short description. The best practice is to split JavaScript from HTML and avoid putting JavaScript inside HTML head and body as much as you can.
So, first create three files: Test.js Example.html and Test.css. Of course, you also need jQuery file which you just include here inside the head. In Example.html put the following code:
<html>
<head>
<link rel="stylesheet" type="text/css" href="Test.css"/>
<script type="text/javascript" src="jQuery.js"></script>
<script type="text/javascript" src="Test.js"></script>
</head>
<body>
<input type="text" id="test"/><span id="popup"></span>
</body>
</html>
In Test.css add some style to your pop-up span element (you could also use division element and style it to your liking if you want fixed height and width, add shadows and so on):
#popup {
background-color: red;
color: white;
display: none;
}
And finally, put the following JavaScript code in Test.js:
$(document).ready( function() {
$("#test").keyup( function() {
if($("#test").val().length>5) {
$("#popup").fadeIn();
$("#popup").html("Invalid length. Maximum is 5.");
}
else {
$("#popup").fadeOut();
}
});
});
By dividing JavaScript, CSS and HTML into separate files, you get much tidier HTML and separated styling and client-side logic from markup.
Old Answer
Wrap the code inside $(document).ready().
Like this:
$(document).ready(function() {
document.getElementById('confirm').addEventListener('change', checkFile, false);
approveletter.addEventListener('change', checkFile, false);
});
function checkFile(e) {
if ($('#confirm').val().length > 0) {
alert("txt");
}
}
Also, addEventListener is not available in IE8 and below. You could use the onchange event, like this:
$(document).ready(function() {
document.getElementById("confirm").onchange = checkFile;
});
There is a similar method for IE8 and earlier called attachEvent. In case of using the attachEvent method, it would look something like the following:
$(document).ready(function() {
document.getElementById('confirm').attachEvent('change', checkFile);
approveletter.attachEvent('change', checkFile);
});
You could also use the jQuery.change() as suggested in the comments by Protron:
$(document).ready(function() {
$("#confirm").change(function() {
if ($('#confirm').val().length > 0) {
alert("txt");
}
});
});
And of course it's possible to do it without the classic alert pop-up window. You could create your own HTML division element with display:none and show it when necessary. Just send me a note in the comments if you need instructions on that as well.

Using this, you need not click the web page.
<input type="text" name="text" id="confirm"><br /><br />
<span id="status" ></span>
<script type="text/javascript">
$('#confirm').keyup(function () {
if ($('#confirm').val().length > 0) {
$('#status').html("Text entered");
}
else
{
$('#status').html("Text removed");
}
}
)
</script>

Related

Changing a javascript variable inside a DIV using JQuery

Firstly - i'm not even sure if the syntax is correct, but what i'm trying to do is, i have a div showing an animated image sequence which picks a position using a variable.
I will eventually use JSON to feed the value being changed, but for now i'm just trying to understand how to use JQuery to change the variable. Here's the code:
<div id="noiseAnimDiv" style="float: center; background-color: #ffffff; ">
<script type="text/javascript" src="./animatedpng.js">
</script>
<script type="text/javascript">
var stoptheClock = 3;
noiseAnim = new AnimatedPNG('noise', './noise/noise0.png', 8, 50);
noiseAnim.draw(false);
noiseAnim.setFrameDelay(stoptheClock, 1000); //spin yet stay on value 3
</script>
</div>
<script type="text/javascript" src="//code.jquery.com/jquery-1.10.2.js"></script>
<script>
$(document).ready(
function() {
$("#stoptheClock").val(6); //
}
);
</script>
Any help much appreciated
code is live btw at so you can at least see the animation seq
http://ashleyjamesbrown.com/fgbp/noise.htm
The AnimatedPNG library you are using only checks the variable's value once - when initialized. in your code, you are changing the value after initializing it.
$(document).ready(
function() {
$("#stoptheClock").val(6); //
}
);
Should be
function() {
stoptheClock = 6;
noiseAnim.draw(false);
noiseAnim.setFrameDelay(stoptheClock,1000);
}
You are not using JQuery for any useful cause in your code, therefore I have removed all of the Jquery parts.

Showing images conditionally

I've been working on a simple website for a while now. The basic coding and CSS are complete, so I am now looking to expand by adding certain features to the website. As it is a fully functioning website that serves a purpose, the main source of revenue comes from Google AdSense. I am looking for a way to show an image if Adblock is detected and another one if if it not.
The method I've found for detecting whether AdSense is active is shown below:
JS (saved as advertisement.js)
document.write('<div id="TestAdBlock" style="display:none;">an advertisement</div>');
The HTML bit:
<div id="adblockFrame">
<script type="text/javascript" src="js/advertisement.js"></script>
<script type="text/javascript">
if (document.getElementById("TestAdBlock") != undefined)
{
document.write('<strong>ADBlock Plus</strong> NOT detected!');
}
else
{
document.write('<strong>ADBlock Plus</strong> detected!');
}
</script>
</div>
CSS:
#adblockFrame {
visibility: hidden;
}
What I'm asking is that if someone could be kind enough to show me how, instead of displaying text, the JS would show an image in its place. I'm not that good with JS so I'm grateful for any help.
I would create an empty target div :
<div id="adblockDetector"></div>
<script type="text/javascript">
if (document.getElementById("TestAdBlock") != undefined)
{
document.getElementById('adblockDetector').innerHTML="<img src='noadblock.jpg' alt='no adblock' />";
}
else
{
document.getElementById('adblockDetector').innerHTML="<img src='adblock.jpg' alt='Adblock detected!' />";
}
</script>
Assuming you are using jquery, just because you tagged it:
html
<div id="wheretoappend"></div>
js
var whereToAppend = '#wheretoappend';
var myDiv = $('<div/>', {id: 'mydiv'});
($('#adblockFrame').length)
? myDiv.addClass('hasit').appendTo(whereToAppend)
: myDiv.addClass('doesnt').appendTo(whereToAppend);
CSS
.hasit {background: url('hasit.png');}
.doesnt {background: url('doesnt.png');}
Please, don't use the devil document.write!
If you want to add content to your page, use DOM methods or .innerHTML.
If you want to detect AdBlock, just create a global variable in advertisement.js
For example:
advertisement.js:
window.TestAdBlock = true;
Your page:
<div id="adblockFrame">
<img id="TestAdBlock" alt="AdBlock Detected???" />
<script type="text/javascript" src="js/advertisement.js"></script>
<script type="text/javascript">
(function() {
var AdBlockImg = document.getElementById('TestAdBlock');
if (window.TestAdBlock)
{
AdBlockImg.src = "/images/AdBlockDetected.jpg";
AdBlockImg.alt = "AdBlock Detected!";
}
else
{
AdBlockImg.src = "/images/AdBlockNOTDetected.jpg";
AdBlockImg.alt = "AdBlock NOT Detected!";
}
AdBlockImg.title = AdBlockImg.alt;
});
</script>
</div>
Firstly, you shouldn't use document.write for anything. It's just bad practice. But here's generally how I'd do it with jquery, since you tagged it:
<div id="adblockFrame>
<script type="text/javascript" src="js/advertisement.js"></script>
<script type="text/javascript">
var adsAllowed = adsAllowed || false;
var src = adsAllowed ? '/images/myAd.png' : '/images/noAd.png';
$('#ad').attr('src',src);
</script>
<img id="ad"/>
</div>
advertisement.js
var adsAllowed = true;

My JavaScript if...else statement isn't working properly

So I'm fairly new to javascript, and I'm trying to use a simple if...else statement to toggle between showing and hiding a div element. My HTML page looks like this:
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Test</title>
<style type="text/css">
#fluffy {
height:200px;
width:200px;
background-color:yellow;
display:block;
}
#pepper {
height:200px;
width:200px;
background-color:green;
display:block;
}
</style>
</head>
<body>
<div id="fluffy"></div>
<div id="pepper" onclick="changeState()"></div>
<script type="text/javascript">
function changeState() {
var divState = document.getElementById('fluffy').style.display;
if (document.getElementById('fluffy').style.display == 'block') {
document.getElementById('fluffy').style.display = 'none';
}
else if (document.getElementById('fluffy').style.display == 'none') {
document.getElementById('fluffy').style.display = 'block';
} else {
alert('test error message');
}
}
</script>
</body>
</html>
When I load the page in my browser, I receive an alert box containing 'test error message'. My original code had document.getElementById('fluffy').style.display stored in a variable called divState, but this didn't even give me an alert box, it didn't do anything. I get the feeling I'm using == wrong or something, but I'm really not sure. I've used ===, and when that didn't work I switched to ==, which is in the code above.
If anyone knows what exactly I'm doing wrong, I would appreciate the help.
Thanks, Harold
Alright, it looks like you guys fixed my problems. I can't thank you enough, and I will definitely look into jQuery!
Try changing the onclick to be this
<div id="pepper" onclick="changeState"></div>
document.getElementById('fluffy').style.display is ''. Since you're setting styles with a stylesheet, you'll have to use getComputedStyle (plus friends for cross-browser compatibility). You can find an example cross-browser implementation in the answer to Get all computed style of an element.
I know, you're trying to learn JavaScript what I also want to encourage, but with jQuery, this whole stuff would be a one-liner plus crossbrowser-friendly etc.
<div id="fluffy"></div>
<div id="pepper"></div>
The <script> contains just:
$("#pepper").click(function () { $("#fluffy").toggle(); });
Try it out at JSFiddle.
When the page first loads, the div doesn't have any inline styles. element.style reads inline styles only.
You will need to render the div with style="display:block;" or if you can't/don't want to do that, look into getComputedStyle options for your supported browsers
Use computed style:
<div id="fluffy"></div>
<div id="pepper" onclick="changeState()"></div>
<script type="text/javascript">
function changeState() {
var fluffy = document.getElementById('fluffy');
var divState = window.getComputedStyle(fluffy).display;
if (divState == 'block') {
fluffy.style.display = 'none';
}
else if (divState == 'none') {
fluffy.style.display = 'block';
} else {
alert('test error message');
}
}
</script>
jsFiddle

Hide div when another div is empty

I know theres lots of answers on this problem, but I've read through all I can find but still cant get it to work.
I have a div which i need to be hidden if another div is empty, or just containing whitespace.
<div id="rt-main" class="mb12">
<div class="rt-grid-12">
<div class="rt-block component-block main-overlay-light">
<div id="rt-mainbody">
<div class="component-content">
<div class="blog-featured"></div>
( I want to hide div.mb12 when div blog-featured = ' ' )
My closest bet is this:
$(document).ready(function() {
str = $('div.section').text();
if($.trim(str) === "") {
$('div.section').hide();
}
});
But I get all sorts of errors in the console when trying.
Now I've got "TypeError: Cannot call method 'text' of null"
On the actual site (not included in the question), you have this:
jQuery.noConflict();
This makes it so that $ is no longer jquery. Most likely because one of the many other libraries you have included uses the $ name. You can simply change your code to use jQuery in place of $:
jQuery(document).ready(function() { ...
Alternatively, you can assign jQuery to a different variable name:
var $j = jQuery.noConflict();
$j(document).ready(function(){ ...
You want this -
jQuery(document).ready(function () {
var str = jQuery('div.blog-featured').text();
if (jQuery.trim(str) === "") {
jQuery('div.mb12').hide();
}
});
Demo ---> http://jsfiddle.net/PqXWJ/20/
Are you loading the jQuery library before your script? Do you have something like this in the <head> tags of your page?
<head>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
</head>
<script type="text/javascript">
$(document).ready(function() {
etc etc
</script>

Two Javascript scripts conflicting (show/hide)

I have two Javascript scripts on a site. One is an accordion (show/hide) and the other is a basic script to show/hide based on a hyperlink click. Both scripts work fine independently, but once together on the same page the accordion one stops working: the click to display the items in the accordion stops working. Here's the code:
<link rel="stylesheet" href="[template_url]/js/tinycord/tinycord.css" type="text/css" />
<style>
.inner-boxes .box3, .details1 {
display:none;
}
</style>
<script type="text/javascript">
var parentAccordion=new TINY.accordion.slider("parentAccordion");
parentAccordion.init("acc","h3",0,-1);
</script>
<script>
$(function(){
$(".para").click(function(){
$("#fillit").html($(this).next(".details1").html());
});
$(".details1:first").clone().appendTo("#fillit").show();
});
</script>
<script type="text/javascript" src="[template_url]/js/tinycord/script.js"></script>
content of script.js
var TINY={};
function T$(i){return document.getElementById(i)}
function T$$(e,p){return p.getElementsByTagName(e)}
TINY.accordion=function(){
function slider(n){this.n=n; this.a=[]}
slider.prototype.init=function(t,e,m,o,k){
var a=T$(t), i=s=0, n=a.childNodes, l=n.length; this.s=k||0; this.m=m||0;
for(i;i<l;i++){
var v=n[i];
if(v.nodeType!=3){
this.a[s]={}; this.a[s].h=h=T$$(e,v)[0]; this.a[s].c=c=T$$('div',v)[0]; h.onclick=new Function(this.n+'.pr(0,'+s+')');
if(o==s){h.className=this.s; c.style.height='auto'; c.d=1}else{c.style.height=0; c.d=-1} s++
}
}
this.l=s
};
slider.prototype.pr=function(f,d){
for(var i=0;i<this.l;i++){
var h=this.a[i].h, c=this.a[i].c, k=c.style.height; k=k=='auto'?1:parseInt(k); clearInterval(c.t);
if((k!=1&&c.d==-1)&&(f==1||i==d)){
c.style.height=''; c.m=c.offsetHeight; c.style.height=k+'px'; c.d=1; h.className=this.s; su(c,1)
}else if(k>0&&(f==-1||this.m||i==d)){
c.d=-1; h.className=''; su(c,-1)
}
}
};
function su(c){c.t=setInterval(function(){sl(c)},20)};
function sl(c){
var h=c.offsetHeight, d=c.d==1?c.m-h:h; c.style.height=h+(Math.ceil(d/2)*c.d)+'px';
c.style.opacity=h/c.m; c.style.filter='alpha(opacity='+h*100/c.m+')';
if((c.d==1&&h>=c.m)||(c.d!=1&&h==1)){if(c.d==1){c.style.height='auto'} clearInterval(c.t)}
};
return{slider:slider}
}();
I don't think these scripts actually conflict. You are loading the accordion code after you try to use it. Perhaps reorder your script tags.
<script type="text/javascript" src="[template_url]/js/tinycord/script.js"></script>
should go before the use of TINY.accordion which it defines:
var parentAccordion=new TINY.accordion.slider("parentAccordion");
I don't know enough about the meaning of the string arguments in the call to init, but perhaps you could change the script element that creates the accordion and initializes it to happen on document load, for example by delaying it using jQuery's $.ready or by moving it after any elements whose ids appear in those string arguments.
Also the accordion code is unintentionally using a global s. And short names like s can easily collide which is a maintenance hazard even if not the cause of your immediate problem.
var a=T$(t), i=s=0, ...
is not declaring s locally. Perhaps edit it to say
var a=T$(t), s, i=s=0, ...
<script language="javascript">
jQuery.noConflict();
var b=jQuery.noConflict() || $.noConflict;
b(document).ready(function(){
b(".btn-slide").click(function(){
b("#panel").slideToggle("slow");
b(this).toggleClass("active"); return false;
});
});
</script>
Then instead of $ use b to access jQuery.

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