Get Form Option Value

Apr 16, 2011

Code:
<form>
<select multiple size="1">
<option value="AAA">AAA</option>
<option value="BBB">BBB</option>
<option value="CCC">CCC</option>
</select>
</form>
<button>CLICK</button>

When the button is clicked, I want an alert box that shows the value of the chosen form option. How can I accomplish that?

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I am searching a solution to change a ComboBox by popup I have found this script on the web. Is it also possible to select the newVendor just after adding? Is this script ok or are there better solutions?

<script type="text/javascript">
<!--
function message(value){
if(value=="newVendor"){// New Vendor is selected
var vendor = prompt("Vandor's Name","");
var elementSelect = document.getElementById('vendor');
try{
[Code]....

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Here is my options select from my form. Its dynamically generated with php.
Code:
<select id="upgrade[]" name="upgrade[0]" onchange="javascript:calTotal(this);">
<option value="1">1</option><option value="2">2</option>
</select><br />
<select id="upgrade[]" name="upgrade[1]" onchange="javascript:calTotal(this);">
<option value="1">1</option><option value="2">2</option>
</select><br />
<select id="upgrade[]" name="upgrade[2]" onchange="javascript:calTotal(this);">
<option value="1">1</option><option value="2">2</option>
</select><br />

Using javascript I want to get the selected value. Here is what I have, but its getting no where:
Code:
function calTotal(aVar)
{
var c = document.getElementsByName(aVar);
c = c.length ? c : [c];
for(var i=0; i<c.length; ++i)
{
if(c[i].value==1)//I am getting undefined here
{
}
}
Is there a way to loop through an array of option selected like the one I have here?

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Sep 23, 2009

I'm trying to automatically generate a new <option> tag in a html form using the below code, but it's not working. The get_lightboxes function is being called via the add_to_lightbox functon.

Javascript:
function get_lightboxes(title, new_lightbox_id){
var new_option = document.createElement('option');
new_option.text = title;
new_option.value = new_lightbox_id;
var select_box = document.getElementByID('lightbox_select');
[Code]...

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Ok the setup is basically this. The user selects a option in a drop down field, whatever they select through javscript additional records are populated in a second select field. This second select field allows for multiple selections, however I am submitting the form to a php script and I want to capture the multiple selections in the second select field. To do that for php I need to turn the field into an array so I have to add the brackets, [], to the name of the select field.

In php you can name the field like so:

Code:
<select name="fld[]" size="1">

The problem is in the js function when I give it a field name with [] the script doesnt work. Here is the js function:

Code:
function channelform(select_value) {
IntPath = document.channel_form.cid[]
TheOptions = IntPath.options.length

[Code]..

You can see the [] for the cid field name. Whenever I add that to the field name the js script is broken. How do I get it to work so that I can pass an array to php when the form submits?

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I'm making a form with some select options, and when clicking an option from the drop down, another option will appear.

The thing is that it seems to work in the most common browsers, but for myself, as a beginner in Javascript, I don't know if it's written the correct way. What could be done better?

Aswel, before I write further to this part of code, I want to know that the value of the second option will pass correctly via the PHP process script afterwards... because initially, the second option is not mentioned in the .html file, it comes in virtually by the javascript.

Html:

Code HTML4Strict:
<form action="link-to-php-process-script" method="post">
<p>
<label for="blabla">Choose: </label>
<select name="blabla" id="choice">

[Code]....

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I am having a problem with a simple javascript validation routine for a drop-down list, which works fine when there is only one form on the web page, but breaks when another form is added. I am new to javascript, so I expect this is a simple error in syntax.

When there was only one form on the page: Code:

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Dec 2, 2010

I want to use a drop-down menu selection option to submit a form. But the form's contents change depending on the option. This is the basic form:
<FORM ID="go1" METHOD="POST" TARGET="_self">
<INPUT TYPE=HIDDEN NAME=UserID VALUE="<%UserID%>">
<INPUT TYPE=HIDDEN NAME=Password VALUE="<%Password%>">
<INPUT TYPE=HIDDEN NAME=SubUnitID VALUE="4266">
<INPUT TYPE=HIDDEN NAME=PageID VALUE="1">
<INPUT TYPE="IMAGE" class="hand" border="0" src="/images/my.gif" width="45" height="26" vspace="5">
</FORM>

At the moment, it's an image which gets clicked on but it needs to be the option chosen. I think I can do that with:
function gotoPage(s){
var v = s.selectedIndex;
var select = document.forms.form.elements.input; // selects question
if (v == 1){...}
if (v == 2){...} etc.

However, as I said, the form's contents must change depending on the option chosen: The form's values which change are:
<INPUT TYPE=HIDDEN NAME=SubUnitID VALUE="4266">
<INPUT TYPE=HIDDEN NAME=PageID VALUE="1">

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Feb 5, 2006

I am allowing a user to selected a date to schedule an event and it
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and a month the appropriate days for that month show (i.e. 28 days if
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I'm trying to get the value of a selected option value. I've tried using getElementById("fieldname").selectedIndex.value and formname.elements["fieldname"].options[selectedIndex].value with no joy.

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Dec 15, 2011

I'm new to JavaScript. I'm trying to create my form in such a way that if 'Premium' is selected, a the text box with label 'membership no' is displayed and if 'bronze' is select, the drop-down list 'sponsor' is displayed instead....here's what my form looks like...

<form id="form1" name="form1" method="post" action="">
<p><label for="select">Membership:</label>
<br /><select name="select" id="select">
<option value="Premium" selected="selected">premium</option>
<option value="Bronze">bronze</option>
</select></p>
<p>Membership No:<br />
<input type="text" name="textfield" id="textfield" />
</p>
OR<br />

Sponsor:
<br />
<select name="select2" id="select2">
<option value="329">329</option>
<option value="234">234</option>
</select>
</form>

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Is this possible? Can I use JavaScript to edit a select form's option values given a certain condition?What I am trying to do is when a specific month is selected on my drop down select form (like february for example), to edit the day form so that it deletes teh options for 29, 30 and 31, thus not allowing the user to put in an invalid date.I know its only client side validation and thats fine. I am gonna do server side later.

Code:

<head>
function signup (frm)
{[code]....

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May 26, 2009

how can I make it so whenever I select a different year or different month it doesn't reset the Day option back to option 1 (the option that's called Day), unless of course you select a day then change the month that doesn't contain that day (like if u choose january 31 and then select february, it obviously must reset).

For example, say you choose january and then the day 20. Now if you select february, I do not want it to reset the day back to "Day"

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Here is a working example of the drop downs http://ckeanedesign.t35.com/dob2.html

Here is the HTML code I am experimenting with (thanks to felgall)

[Code]...

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Code:
<select id="selectedColor">
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[code]....

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Mar 9, 2009

I am building a form with ColdFusion, HTML, and will be using some Javascript, and I wnt the javascript to tell one form object to display itself when a certain option is chosen from a <select> tag.

<cfquery name="getCategories" datasource="#mydatasource#" username="#myusername#" password="#mypassword#">
SELECT * FROM categories WHERE type = 'cat' ORDER BY id
</cfquery>
<cfform action="engine.cfm" method="post" format="html">
<table cellpadding="0" cellspacing="0">
<tr><th colspan="2">New Category</th>
</tr><tr>
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<td><select name="type">
<option value=" "></option>
<option value="cat">Main Category</option>
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</td></tr><tr>
<td colspan="2"><cfinput type="submit" name="submit" value="Submit" validate="submitonce" validateat="onserver,onsubmit"></td>
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Code:
function calcMe(){
for (var i=0; i < document.form.radio.length; i++){
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}} if (document.form.radio1.checked) {
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<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.5/jquery.min.js"></script>
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Code:

<html>
<body>
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<table>

[Code].....

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...
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