I would make sure that the items in select from activating the specific features I'll explain.
I have this select:
<select id='selection'> <!-->this is for the class<!-->
<option>4B</option>
<option>5B</option>
</select>
<select id='secondSelection'> <!-->this is for the data to be loaded<!-->
</select>
if I select 4B must load all pupils corresponding to that class, pupils are in the array 4B.
if instead go to select 5B must be able to load in the other select the contents of the 5B. The user can also decide to select both classes.
EXAMPLE:
4B [selected in selection] => Mario, Luigi, John are now loaded in secondSelection
similarly for all values have to be able to do the same thing by enabling multiple.
I have already made a similar code in the past, but here the situation is a bit 'different, I would like the help of an expert. PEACE!
Well, you can do
var b4 = ["Mario", "Luigi", "John"],
b5 = ["Some", "Other", "Names"],
elem = document.getElementById('selection');
elem.onchange = function () {
document.getElementById('secondSelection').innerHTML = this[elem.options[this.selectedIndex].text == "4B" ? "b4" : "b5 "].map(function (x) {
return "<option>" + x "</option>";
}).join();
};
You can use
<select onchange="myFunction()">
<script>
function myFunction(){
}
</script>
it will also work
Related
I am new to coding, therefore I don't fully understand this piece of code.
What I am trying to achieve is that I want to put in multiple drop down menus.The problem with my code is that it accepts values from only certain drop down menus.
My code helps users select the region, country and state according to what they select in the previous drop down menus. I am using this code because it is similar to what I am planning to achieve.
The issue that I face is that I have about 8 drop down menus whose data need to be used. There are 8 region drop downs, 8 country drop downs, and 8 state drop downs. All in the same page. The code stops working if I put 8 ones. What am I doing wrong?
Can somebody please help me? This is the code:
<form>
Region» <select onchange="set_country(this,country,city_state)" size="1" name="region">
<option value="" selected="selected">SELECT NOTE</option>
<option value=""></option>
<script type="text/javascript">
setRegions(this);
</script>
</select>
Country» <select name="country" size="1" disabled="disabled" onchange="set_city_state(this,city_state)"></select>
City/State» <select name="city_state" size="1" disabled="disabled" onchange="print_city_state(country,this)"></select>
<script>
////////////////////////////////////////////////////////////////////////////
// city_state.js ///////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////
var countries = Object();
countries['C'] = '|C|Cm|';
countries['D'] = '|D|Dm|';
////////////////////////////////////////////////////////////////////////////
var city_states = Object();
//C
city_states['C'] = '|032010|335553|';
city_states['Cm'] = '|335543|';
city_states['D'] = '|000232|557775';
city_states['Dm'] = '|000231|557765';
////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////
function setRegions()
{
for (region in countries)
document.write('<option value="' + region + '">' + region + '</option>');
}
function set_country(oRegionSel, oCountrySel, oCity_StateSel)
{
var countryArr;
oCountrySel.length = 0;
oCity_StateSel.length = 0;
var region = oRegionSel.options[oRegionSel.selectedIndex].text;
if (countries[region])
{
oCountrySel.disabled = false;
oCity_StateSel.disabled = true;
oCountrySel.options[0] = new Option('SELECT TYPE','');
countryArr = countries[region].split('|');
for (var i = 0; i < countryArr.length; i++)
oCountrySel.options[i + 1] = new Option(countryArr[i], countryArr[i]);
document.getElementById('txtregion').innerHTML = region;
document.getElementById('txtplacename').innerHTML = '';
}
else oCountrySel.disabled = true;
}
function set_city_state(oCountrySel, oCity_StateSel)
{
var city_stateArr;
oCity_StateSel.length = 0;
var country = oCountrySel.options[oCountrySel.selectedIndex].text;
if (city_states[country])
{
oCity_StateSel.disabled = false;
oCity_StateSel.options[0] = new Option('SELECT TAB','');
city_stateArr = city_states[country].split('|');
for (var i = 0; i < city_stateArr.length; i++)
oCity_StateSel.options[i+1] = new Option(city_stateArr[i],city_stateArr[i]);
document.getElementById('txtplacename').innerHTML = country;
}
else oCity_StateSel.disabled = true;
}
function print_city_state(oCountrySel, oCity_StateSel)
{
var country = oCountrySel.options[oCountrySel.selectedIndex].text;
var city_state = oCity_StateSel.options[oCity_StateSel.selectedIndex].text;
if (city_state && city_states[country].indexOf(city_state) != -1)
document.getElementById('txtplacename').innerHTML = city_state + ', ' + country;
else document.getElementById('txtplacename').innerHTML = country;
}
</script>
Please check out the updated code at http://jsfiddle.net/HzJ9J/1/
I have not pasted one javascript code in the Javascript section, because I think that specific code needs to run in the correct place. Not sure if I have to move it to the javascript section.
The call to setRegions(this); is failing because 'setRegions is not yet defined; the function definition hasn't been loaded by the browser yet.
I added an ID attribute to your SELECT:
<select onchange="set_country(this,country,city_state)" size="1" name="region" id="region">
and then moved the call to setRegions to the very last thing before the closing SCRIPT tag. Can't use THIS any more, so I added a document.getElementById:
setRegions(document.getElementById("region"));
Using document.write is in general a bad idea, and will not work when the call to setRegions is moved out of line, as it must be. One can accomplish the same thing using innerHTML, so I changed setRegions to be this:
function setRegions(elem) {
for (region in countries)
elem.innerHTML +='<option value="'+region+'">'+region+'</option>';
}
I also deleted the empty OPTION element from the SELECT. Those changes make your code work, although there may be more things that need adjustment.
I'm supposed to answer questions, not give advice, but if you're not using Firefox and the Firebug debugger, or the similar tool in Chrome, you're working far too hard!
Edited 2014-07-21 to add: Your code:
<script type="text/javascript">
setRegions(document.getElementById("region1"));
</script>
is between the beginning and ending tags for the SELECT with the ID of "region1", and I would have bet that the DOM element would not exist at the time of the call. However, if I move your JavaScript into the head of the document, the region selects work, at least in Firefox. I'm not sure why, and I strongly urge you to move that stuff to the end as I've done in my example, or hook it to onload. The DOM really does have to be set up before you start manipulating it.
However, when I run your code with the changes I just suggested, using the Firebug debugger, it tells me: TypeError: oCountrySel.options is undefined.
Get a copy of Firebug, install it in Firefox, or use the developer tools in Chrome, run your code from your own server environment, and look at the console tab. It really will help you, and it really isn't hard.
I have a script like this
<script type="text/javascript">
function showSelected(val){
document.getElementById
('selectedResult').innerHTML = "The selected number is - "
+ val;
}
</script>
<div id='selectedResult'></div>
<select name='test' onChange='showSelected(this.value)'>
<option value='1'>one</option>
<option value='2'>two</option>
</select>
The output is shown with
<div id='selectedResult'></div>
So, I want to use this a variable
Actually, I want to get drop down box value with out submit. This script make it, but I can use another suggestions
Thanks
I'm not sure I really understand the question, but if you want to get what's stored in the DIV, use:
var stuff = document.getElementById('selectedResult').innherHTML;
I can suggest you another alternative i think is more useful and you can use it in different way # your project.
In this example you click the options you one and insert them to option list, you can send them from your select name=test if you want, you just need to change it.
DEMO
This is the script you can catch item,links,images,attributes and add them to select box:
$(document).ready(function(){
$('li').on('click',function(){
$('#theSelect').append('<option SELECTED>'+$(this).find('img').attr('value')+'</option>');
var seen = {};
$('option').each(function() {
var txt = $(this).text();
if (seen[txt])
$(this).remove();
else
seen[txt] = true;
});
});
})
$('#del').click(function() {
var $list = $('#theSelect option');
var d = $list.length;
var b=($list.length-1);
$('#theSelect option:eq('+b+')').remove();
});
a friend asked me to help him with a form, a client of his wants to make a form a bit more dynamic...my javascript is minimal at best since i just started learning.
He asked me something along the lines of " how can i make a form show another pull down ONLY WHEN a certain option is selected "
in the example he gave me, by default when page loads,he has a pull down menu which has 2 options, MANHATTAN and option two is BROOKLYN.
If Manhattan is chose, that reveals another pull down with zips for manhattan, if Brooklyn is chosen the same for BK.
in sample html, something along the lines like this:
<div>
<form>
<select name="boro" id="boro">
<option value="manhattan" id="manh">Manhattan</option>
<option value="brooklyn" id="brook">Brooklyn</option>
</select>
</form>
<br/>
<div id="empty2fill"></div><!-- for showing chosen results -->
</div>
i want to target/capture the option chosen by the user above on the pull down menu, to then activate this function(below).
according to his request what i guess id do is,(as a newbie), then as far as the .js goes (pseudo code):
<script type="text/javascript">
function valBoro (){
if( brook is chosen){ document.getElementById('empty2fill').innerHTML=" new dropdown code here")
}
}
</script>
aside from not knowing, my main problem is i dont know how to target the option chosen in the menu to thereafter, apply the function (which will be written later)
any ideas, tips etc are greately appreciated.
thanks in advance
Another option is to create the two dropdown lists and set the style display to "none". Then you can catch the onChange event and set display to "" based on the value of the select element.
function showZip() {
var boro = document.getElementById("boro");
if (boro.value == "manhattan") {
var zipManhattan = document.getElementById("zipManhattan");
zipManhattan.style.display = "";
}
}
And in the html
<div>
<select name="boro" id="boro" onchange="javascript:showZip();">
<option value="manhattan" id="manh">Manhattan</option>
<option value="brooklyn" id="brook">Brooklyn</option>
</select>
<br/>
<select name="zipManhattan" id="zipManhattan" style="display:none;">
<option value="zip1" id="zip1">1111</option>
<option value="zip2" id="zip2">2222</option>
</select>
<div id="empty2fill"></div><!-- for showing chosen results -->
</div>
Here is a link to a jsfiddle showing example code.
http://jsfiddle.net/WKqth/
Example markup:
<div>
<form>
<select name="boro" id="boro">
<option value="" id="none">Select a boro.</option>
<option value="manhattan" id="manh">Manhattan</option>
<option value="brooklyn" id="brook">Brooklyn</option>
</select>
</form>
<br/>
<div id="empty2fill"></div><!-- for showing chosen results -->
</div>
Example js
// include this js below the form in the body, or wrap it in a function and assign that to window.onload, or use a library that provides onDomReady (in jQuery, $(document).ready(function () ... });
var selectElement = document.getElementById('boro');
var showBoroSelect = function () {
// find the selected element
var selectedOption = selectElement.options[selectElement.selectedIndex].id,
// find the element that will contain the new drop down
containerElement = document.getElementById('empty2fill'),
// define the html for the manhattan drop down
manhSelectInnerHTML = '<select name="secondary"><option value="derp">manh derp?</option><option value="herp!">manh herp!</option></select>',
// define the html for the brooklyn drown down
brookSelectInnerHTML = '<select name="secondary"><option value="derp">brook derp?</option><option value="herp!">brook herp!</option></select>',
newInnerHTML;
// determine which html to use based on the selection
if (selectedOption === 'manh') {
newInnerHTML = manhSelectInnerHTML;
} else if (selectedOption === 'brook') {
newInnerHTML = brookSelectInnerHTML;
} else {
// no boro was selected, hide the menu
newInnerHTML = '';
}
// set the container to the new innerHTML
containerElement.innerHTML = newInnerHTML;
};
// when the boro select changes, show the new menu
selectElement.onchange = function () {
showBoroSelect();
};
// if you select a boro and reload the page, the boro may already be selected (for example, firefox might do this)
// this will set the boro menu initially before the user changes it
showBoroSelect();
You want to handle the change event of your "boro" select element.
I've put a plain-JS example solution on jsfiddle at http://jsfiddle.net/FHArd/1/
This creates three select lists - one is your "boro" and the other two are the zip code lists, but they are hidden via CSS until a selection is made.
The change event handler simply adds and/or removes classes from the zip code select elements; the CSS hides or shows the lists based on the class "active" that is attached to the zip code select list.
Note - being there in jsfiddle the way you start things up is a little different than normal. You'd really run your setup function at the onload or ondomready event.
This should do it.
<select name="boro" id="boro" onchange="valBoro(this)">
<option value="manhattan" id="manh">Manhattan</option>
<option value="brooklyn" id="brook">Brooklyn</option>
</select>
<script type="text/javascript">
function valBoro(dropDown) {
if (dropDown.options.[dropDown.selectedIndex].value.equals("manhattan")) document.getElementById('empty2fill').innerHTML = "newHTMLCode";
//change "manhattan" to whatever option you want to use
}
</script>
Gang -
This is my first time posting. I'm a JavaScript noob - I think I've figured out what direction to take - just not sure how to get there.
I have a triple drop down select menu. I want the third(final) selection to reveal a hidden div. Am I on the right track by thinking I need to use a combination of onchange, getElementById and if statements?
The javascript code for the dropdown is Philip M's Cut & Paste Triple Combo box from JavaScriptKit.com. That work's beautifully. I won't insert my exact code as the category list is significantly longer.
var categories = [];
categories["startList"] = ["Wearing Apparel","Books"]
categories["Wearing Apparel"] = ["Men","Women","Children"];
categories["Books"] = ["Biography","Fiction","Nonfiction"];
categories["Men"] = ["Shirts","Ties","Belts","Hats"];
categories["Women"] = ["Blouses","Skirts","Scarves", "Hats"];
categories["Children"] = ["Shorts", "Socks", "Coats", "Nightwear"];
categories["Biography"] = ["Contemporay","Historical","Other"];
categories["Fiction"] = ["Science Fiction","Romance", "Thrillers", "Crime"];
categories["Nonfiction"] = ["How-To","Travel","Cookbooks", "Old Churches"];
var nLists = 3; // number of select lists in the set
function fillSelect(currCat,currList){
var step = Number(currList.name.replace(/\D/g,""));
for (i=step; i<nLists+1; i++) {
document.forms['tripleplay']['List'+i].length = 1;
document.forms['tripleplay']['List'+i].selectedIndex = 0;
}
var nCat = categories[currCat];
for (each in nCat) {
var nOption = document.createElement('option');
var nData = document.createTextNode(nCat[each]);
nOption.setAttribute('value',nCat[each]);
nOption.appendChild(nData);
currList.appendChild(nOption);
}
}
function getValue(L3, L2, L1) {
alert("Your selection was:- \n" + L1 + "\n" + L2 + "\n" + L3);
}
function init() {
fillSelect('startList',document.forms['tripleplay']['List1'])
}
navigator.appName == "Microsoft Internet Explorer" ? attachEvent('onload', init, false) : addEventListener('load', init, false);
</script>
My HTML is:
<div id="menuSearch">
<form name="tripleplay" action="">
<p><select name='List1' onchange="fillSelect(this.value,this.form['List2'])">
<option selected>-- Topic of Interest --</option>
</select></p>
<p><select name='List2' onchange="fillSelect(this.value,this.form['List3'])">
<option selected>-- Geographic Area --</option>
</select></p>
<select id="info"name='List3' onchange="getValue(this.value, this.form['List2'].value, this.form['List1'].value)">
<option selected >-- Information Type --</option>
</select>
</form>
</div>
the divs to show/hide are:
<div id="modelingCV">list of publications</div>
<div id="groundwaterCV">list of publications</div>
<div id="subsidenceCV">list of publications</div>
<div id="managementCV">list of publications</div>
<div id="qualityCV">list of publications</div>
<div id="wildlifeCV">list of publications</div>
Is replacing the getValue in the onchange in the final form select with getElementByID the best approach? And replace the getValue in the javascript function with some type of if statement to specify the values? I am guessing I need to hide the divs with javascript vs CSS? Am I completely off base all around?
Oy. Definitely bit off more than I can chew on this one. Any guidance would be appreciated. Thanks for reading!
I have this HTML dropdown:
<form>
<input type="text" id="realtxt" onkeyup="searchSel()">
<select id="select" name="basic-combo" size="1">
<option value="2821">Something </option>
<option value="2825"> Something </option>
<option value="2842"> Something </option>
<option value="2843"> _Something </option>
<option value="15999"> _Something </option>
</select>
</form>
I need to search trough it using javascript.
This is what I have now:
function searchSel() {
var input=document.getElementById('realtxt').value.toLowerCase();
var output=document.getElementById('basic-combo').options;
for(var i=0;i<output.length;i++) {
var outputvalue = output[i].value;
var output = outputvalue.replace(/^(\s| )+|(\s| )+$/g,"");
if(output.indexOf(input)==0){
output[i].selected=true;
}
if(document.forms[0].realtxt.value==''){
output[0].selected=true;
}
}
}
The code doesn't work, and it's probably not the best.
Can anyone show me how I can search trough the dropdown items and when i hit enter find the one i want, and if i hit enter again give me the next result, using plain javascript?
Here's the fixed code. It searches for the first occurrence only:
function searchSel() {
var input = document.getElementById('realtxt').value;
var list = document.getElementById('select');
var listItems = list.options;
if(input === '')
{
listItems[0].selected = true;
return;
}
for(var i=0;i<list.length;i++) {
var val = list[i].value.toLowerCase();
if(val.indexOf(input) == 0) {
list.selectedIndex = i;
return;
}
}
}
You should not check for empty text outside the for loop.
Also, this code will do partial match i.e. if you type 'A', it will select the option 'Artikkelarkiv' option.
Right of the bat, your code won't work as you're selecting the dropdown wrong:
document.getElementById("basic-combo")
is wrong, as the id is select, while "basic-combo" is the name attribute.
And another thing to note, is that you have two variable named output. Even though they're in different scopes, it might become confusing.
For stuff like this, I'd suggest you use a JavaScript library like jQuery (http://jquery.com) to make DOM interaction easier and cross-browser compatible.
Then, you can select and traverse all the elements from your select like this:
$("#select").each(function() {
var $this = $(this); // Just a shortcut
var value = $this.val(); // The value of the option element
var content = $this.html(); // The text content of the option element
// Process as you wish
});