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Enabling/Disabling form field

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Jun 17.2007

How do I enable a form field depending on if a certain radio is checked? I have a form that asks that user for their purpose in writing. The form gives them three options for their purpose – General Information, Contact Staff Member, and Website Issue. Below the radio buttons I have a drop down select box that I want to be enabled ONLY if the user selected the “Contact Staff Member” radio above, so it should be disabled to begin with. How do I do this?

Here is my form that I want to do this with [url]http://calvary.spencer-designs.com/contact/[/url]

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JavaScript

4 Comments(s) ↴

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@thambaJun 17.2007 — Hi, This should help. Try it.

<html>

<head>

<script type="text/javascript">

function enable(){

if(document.dform.rad[1].checked){

document.dform.sel.disabled=false;

}else{

document.dform.sel.disabled=true;

}

}

</script>

</head>

<body>

<form name="dform">

<input type="radio" name="rad" value="1" onclick="enable()">

<input type="radio" name="rad" value="2" onclick="enable()">

<input type="radio" name="rad" value="3" onclick="enable()">

<select name="sel" DISABLED>

<option value="1">a</option>

<option value="2">b</option>

<option value="3">c</option>

</select>

</form>

</body>

</html>
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@novemberGreyauthorJun 18.2007 — I couldn't get it to work...
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@JMRKERJun 18.2007 — Works fine for me using FF, both post and site.

What browser are you using?
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@novemberGreyauthorJun 18.2007 — nevermind it works...I just typed in something wrong, thankyou for your help!
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