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The code:

<html>

<head>

<script type="text/javascript" language="javascript">

function disableBox()

{

document.getElementById("select2").disabled = true;

}

function enableBox()

{

if(document.getElementById("select1").value =="USA")

{

document.getElementById("select2").disabled = false;

}

else

{

document.getElementById("select2").disabled = true;

}

}

</script>

</head>

<body onload="disableBox()">

<form>

<select name="country" id="select1" onchange="enableBox()">

<option>Default</option>

<option value="USA">USA</option>

</select><br />

<select name="state" id="select2">

<option value="New Jersey">New Jersey</option>

<option value="Texas">Texas</option>

<option value="New York">New York</option>

</select>

</form>

</body>

</html>

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13y ago

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