<html> <head> <style type="text/css"> option.disabled { color: #999;} </style>
<script> function preventSelectDisabled(oSelect) { var isOptionDisabled = oSelect.options[oSelect.selectedIndex].disabled; if(isOptionDisabled) { oSelect.selectedIndex = oSelect.defaultSelectedIndex; return false; } else oSelect.defaultSelectedIndex = oSelect.selectedIndex; return true; } </script>
</head> <body> <select name="Type" id="ReportName" class="textinput" onchange=‘return preventSelectDisabled(this)‘> <option value="reportAsset"> Positions Summary </option>
<option value="reportOptions"> Account Transactions </option> <option value="reportOptions"> Performance Summary </option>
<option disabled=‘disabled‘ class=‘disabled‘>
Asset Allocations </option> <option disabled=‘disabled‘ class=‘disabled‘> Options Tracking </option>
<option disabled=‘disabled‘ class=‘disabled‘> Historical Variance </option>
<option disabled=‘disabled‘ class=‘disabled‘> Portfolio Statistics </option> </select> </body>
原文：http://www.cnblogs.com/aersliing/p/3887262.html