Add An Onchange Event To A Select Tag?

Nov 12, 2009

I am trying to add an onchange event to a select tag.

This is my code, but it does not appear to be working.

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=windows-1250">

[Code]....

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Onchange Event Of Select Box?

Jun 23, 2009

I want to make one application using javacript or may be it is in ajax. Let me explain my problem: I have one select box name person which have value 0,1,2,3,4,5 . Now i want that when user will select value 1 from select box then person 1 first name , last name input type box will appear only one time in a row. and if we will select 2 from select box then two row will appear naming person1 and person2 like this: if we will not select any value by default is 0.then it will not show any row regarding person.

[Code]...

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How Onchange Event Of Select Box Will Work

Jun 23, 2009

I am trying to make one application. When we slect value from select box . It will show same type of row according to which value we select from select box.

Let me explain my problem: select box have value 0,1,2,3 . When we select 1 then it will show one row below the select box naming person1 name (input box for name of person1). if we will select value 2 from select box then it will show two row according to select value Like this

person1 Enter Name of person1
person2 Enter Name of person2

By default it have value 0 then it will not show any row below the select box.

i want to do this. But i do not know how i can do this . I think for this i have to onchange event in select box .But in correct way i do not know how it is possible.

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OnChange Event Extracting Value From Select Incorrectly

Jul 23, 2005

I am trying to extract the value from a selected item in a Select/Option, parse it server side using asp and then populate a text box on the same page with the value that was parsed. simple example below:

Two problems I have here:

1. The code: this.frmEditUser.Submit; does not appear to submit the form.
2. If I submit the form using the Submit button, it works except I get:

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JQuery :: Binding An Event To A Select OnChange?

Jul 14, 2009

Here is the html:

<select name="activities_limit" id="activities_limit">
<option value="5" selected="selected">5</option>
<option value="7">7</option>
<option value="10">10</option>
<option value="14">14</option>
</select>

And the jQuery:

$("#activities_limit").bind("change", function() { alert("value changed"); });

I am not seeing the JavaScript alert though.

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Trigger OnChange Event For Select Menu?

Mar 28, 2009

Currently I am using an onchange event on a select menu and it is working fine. But if the user uses any arrow keys the event will not trigger. Is there any way to do that?

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Onchange And Onkeypress Event On A Select Dropdown

Jul 21, 2009

I have a select dropdown which has two events an onchange and onkeypress.
My problem now is when I use the keyboard arrows to select an item from the list in a select drop down the onchange is selected(invoked) before I even reach the second item in the list when using opera and IE but working fine with Firefox and chrome.The onblur event does not work either because the focus must be set to following tag

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Dynamic Select Element: Problem With Onchange Event

Jul 20, 2005

For some reason my change() function is only called when the page loads. I'd
much rather it gets called when the select changes.

Here's the code:

window.onload = init;

function init() {
var new_select = new Selector('tdata','myselect','myid');
var new_select_list = new DataSource("some_list");
new_select_list.addItem(1,"One");
new_select_list.addItem(2,"Two");
new_select_list.addItem(3,"Three");
new_select_list.addItem(4,"Four");
new_select_list.addItem(5,"Five");
new_select.setDataSource(new_select_list);
new_select.formInput("form","input");
}

Selector = function(container_id,name,id) {
var container = document.getElementById(container_id);
this.node = document.createElement("select");
//this.node = new Select();
container.appendChild(this.node);
this.node.name = name;
this.node.id = id;
}

Selector.prototype.setDataSource = function(ds) {
this.dataSource = ds;
for(var i = 0; i < ds.items.length; i++) {
if(ds.items[i] != undefined) {
var option = new Option(ds.items[i],i,false,false);
this.node.options[this.node.options.length] = option;
}
}
}

Selector.prototype.formInput = function(form,element) {
var myform = document.getElementById(form);
this.input = document.createElement("input");
this.input.name = element;
//this.input.type = "hidden";
myform.insertBefore(this.input,myform.firstChild);
this.node.onchange = change(this);
}

function change(selector) {
alert("hello");
selector.input.value = selector.node.value;
}

DataSource = function(name) {
this.name = name;
this.items = new Array();
}

DataSource.prototype.addItem = function(id,item) {
this.items[id] = item;
}

and the html:

<html>
<head>
<script defer src="/javascript/selectors.js"
type="text/javascript"></script>
</head>
<body>
<form id=form>
<table border=1>
<tr>
<td>
Select:
</td>
<td id=tdata>
</td>
</tr>
</table>
</form>
</body>
</html>

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IE Bug: Onchange Event Not Called When Using <optgroup> In Select Drop-down

Jul 20, 2005

In a <select> drop-down, the onchange event isn't called when
scrolling through the dropdown using the mouse-wheel and when crossing
over a new <optgroup>.

Using the example below, notice how the onchange event isn't called
when mouse wheel scrolling between A3 and B1, but it works properly
when scrolling between A1 and A2.

E.g.
------------------------------------------
<html>
<body onload="document.forms['myForm'].elements['mySelect'].focus()">

<form name="myForm" id="myForm">
<select onchange="alert('onchange event');" name="mySelect"
id="mySelect">
<optgroup label="Group A">
<option value="A1">A1</option>
<option value="A2">A2</option>
<option value="A3">A3</option>
</optgroup>
<optgroup label="Group B">
<option value="B1">B1</option>
<option value="B2">B2</option>
<option value="B3">B3</option>
</optgroup>
<optgroup label="Group C">
<option value="C1">C1</option>
<option value="C2">C2</option>
<option value="C3">C3</option>
</optgroup>
</select>
</form>

</body>
</html>
------------------------------------------

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JQuery :: Select Onchange Event Get A Value From Selects Table Row

Oct 23, 2009

I have a table that contains a select element like so

<tr><td>key value in hidden input</td><td><select>options</select></
td></tr>
I need to set
$("selectclass").change(function() {
//Find the value of hidden input in 1st cell of row of the select
list that was changed.
});

So when a user changes the option of the select i need to get the new value the option has been changed to plus the value from the hidden input and submit them via ajax to a method on the server. How can i get the hidden inputs value?

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JQuery :: OnChange Event - Web Application - Each Blur Event Makes A Call Webserver To Store Value Of Textfield

Jan 21, 2010

I'm currently facing a weird issue with the onchange event. I have a web application where each blur event makes a call the webserver to store the value of the textfield. I only want to trigger that ajax call when something has changed, so i track the onchange event on each textfield to set a flag if something has changed.

The onchange event always fires to first time when i click outside of a textfield even if i didn't change anything in the field.

I narrowed it down to the following: A prefilled textfield always fires the onchange-event the first time you leave the textfield. An initially empty textfield does not fire the onchange event.

Sample code (IE 8 on Windows 7 computer):

script:

HTML:

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SELECT OnChange Auto Fill Other SELECT Boxes

Jul 25, 2002

I searched here and some other places on the net but cant find anything that suits my needs. I have a SELECT box with 3 values Code:

<form name="form1">
<select name="length">
<option name="length" value="none">--Select for All--</option>
<option name="length" value="5">--5 Days--</option>
<option name="length" value="7">--7 Days--</option>
<option name="length" value="10">--10 Days--</option>
</select>
</form>

OnChange, I want to invoke a function that auto populates the rest of the SELECT fields in the form. The select boxes will vary in quantity as the page is dynamic, but the values are always the same (like the code above).

Does this make sense?

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Trigger OnChange Event Without Event

Aug 22, 2006

Is there anyway to trigger an onChange event without actually clicking etc.

I want to trigger it from a method. It sounds silly but I'm taking some code over from another developer and if I could do this it would save me days of re-writing!!!

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OnChange Select Box?

Jan 19, 2006

How can I change a select list when a user enters a value into a text box? Like with the below form I would like to have the select box change when the user enters a value in the "id" text box that matches a value in the select box. Say the user types "1122" in the text box I would like the select list to change to to show "John". Is this possible ....

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Function With Onchange Event

Jul 23, 2005

I have an array with mysqls data. I have used this array with several text
box in a formulary.

My question is: How could i use the event onchange to make a function which
update the data of array when i would have change data in a text box.?

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OnChange Event Is Not Working

Jul 23, 2005

In JavaScripts checks for an onChange event against the value of the
textbox at the time of the last onChange event. Since an onChange
Event never fired after you changed the text first time , suppose we
put the same value in the text box then no event is fired.

If we put some other value then it became fired...
It wouldn't fire if we put the same value...

I don't want to use onBlur etc... Isthere any solution with onChange
Event...?

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Cancel OnChange Event

Jul 23, 2005

I Have a text box in a jsp that is pre populated. The text box should accept only numbers and it should be greater than a minimum value (this value depends on the user settings). If the user enters a value less than the minimum value, i should pop up an alert saying that the value
entered is incorrect and reset it back to previous correct value. How could i do it using onchange event of the text box.

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OnChange Event And Focus()

Jul 23, 2005

Am I right in assuming that you can NOT set focus() back to a field in
its onChange event? Is there another way - I have validation that I
would like to set the focus back to the invalid field onChange?

Eg:
<input type=text" name="tstfld" onChange="window.alert('Changed!');
this.focus()">

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Using Javascript In The Onchange Event

Aug 7, 2006

I'm trying to get a tick box to tick automatically when the user changes the
textfield called comm. my code is below but it doesnt work.
Can anyone see why?

function changed(x)
{
document.getElementById(x).checked;
}
<input name="changed" id="ischanged" type="checkbox" value="">
<textarea name="comm[]" rows="2" class="BodyText" style="WIDTH: 99%"
onChange="changed(ischanged)"><?php echo stripslashes($comment);
?>
</textarea>

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Onchange Event For A Dropdown?

Jun 9, 2009

I have a drop down list in html which contains 3 items; Black, white,blue..If i select "Black", a pop up window should come up. (Alert or confirm)JS and need to complete My academic project work.

<select id="mylist">
<option value="White">White</option>
<option value="White">Black</option>

[code]....

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Form Onchange Event?

Jan 6, 2011

I would like to use some event handling on a form, not something I have done before and looking for some assistance. Here is my code:

<select name="LocO">
<option value=""></option>
<option value="O">Outside</option>

[code]....

So what I need to happen, is based on the selection of the first selection box, some of the options of the other selection boxes should not be available.If Outside is selected, everything in LocA should be available, but only up to 4 in Loc1... and if Inside is selected, only up to E should be available in LocA and everything should be available in Loc1.

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Show Div On Onchange Event?

Mar 1, 2011

I would like to have a dropdown to only show when a certain value is chosen from another drop down.

So if in this dropdown the value ETS Rep Discount is chosen he should show the other dropdown

<div class="row">
<div class="fieldName">Discount Type</div>
<div class="fieldValue">
<asp:DropDownList ID="discountTypeDropDownList" runat="server" AutoPostBack="True"
Width="295px"

[Code]....

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Way To Trigger An Onchange Event From A DIV?

Mar 9, 2009

IS there a way to trigger an onchange event from a DIV,eg, I have a DIV like this

Code:
<div id="resultb"></div>
so, when i change the content on this DIV using

[code]....

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Onchange Event Will Not Fire?

Sep 22, 2011

HTML Code:
<html>
<head>

[code]....

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Onchange Event Not Being Registered?

Apr 30, 2010

for some reason the onchange event does not get called in the following code:

<form:select path="parent" onchange="theFunction();">
<form: option label="--Please Select" value="-"/>
<form: options items="${listParents}" itemLabel="description" itemValue="id"/>

[code]....

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Onchange Event With Function?

Oct 14, 2010

I'm having some difficulty in accessing an 'external' function from my onchange event. It will work when the function is included 'inline,' but it's not working when the function is 'stand alone.'Additionally, when it works, the variable isn't being passed - the alert I use says "[object Event]"

Code:
<head>
function nameTextBox2(selectBoxName)

[code]....

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