<script type="text/javascript" language="javascript">
function changeMySize(mode) { if (mode=="expand") document.getElementById("mySelect").style.width = "400px"; else if (mode=="collapse") document.getElementById("mySelect").style.width = "100px"; }
</script> <select style="width:100px;" onfocus="changeMySize('expand')" onblur="changeMySize('collapse')" id="mySelect"> <option value="0">short option</option> <option value="1">long option to test for expanding this control</option> </select>