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form HELP - dependent 2 dropdown select

Discussion in 'JavaScript' started by KingCobra, Oct 26, 2010.

0
  1. #1
    I have form and two dropdown select list.
    I want make them dependent each other. That means if a option selected from one select list then other dropdown select list will be blank.

    I think its simple in JavaScript but I can't make it.

    PLEASE HELP ME.
    Thanks
     
    KingCobra, Oct 26, 2010 IP
  2. wing

    wing Active Member

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    #2
    Ok, you can do like this:
    <html> 
<head> 
 <script type="text/javascript"> 
 function someFunction(p_sDomId) {
 	document.getElementById(p_sDomId).selectedIndex = 0;
 };
</script> 
</head> 
<body> 
<form method="post">

<select id="boxA" onchange="someFunction('boxB')">
<option>-</option>
<option value="A1">A</option>
<option value="A2">B</option>
<option value="A3">C</option>
<option value="A4">D</option>
</select>

<select id="boxB" onchange="someFunction('boxA')">
<option>-</option>
<option value="B1">A</option>
<option value="B2">B</option>
<option value="B3">C</option>
<option value="B4">D</option>
</select>

</form>

</body>
    Code (markup):
    :)
     
    wing, Oct 26, 2010 IP