<script>
function mdlist()
{
document.all.fct.innerText="";
}
</script>
<form id="frm">
<select name="fct">
<option value="1">ss</option>
<option value="2">bb</option>
<select>
<input type="button" onClick="mdlist();">
</form>
function mdlist()
{
document.all.fct.innerText="";
}
</script>
<form id="frm">
<select name="fct">
<option value="1">ss</option>
<option value="2">bb</option>
<select>
<input type="button" onClick="mdlist();">
</form>
function mdlist()
{
document.all.fct.options.length = 0;
}
</script>
<form id="frm">
<select name="fct">
<option value="1">ss</option>
<option value="2">bb</option>
<select>
<input type="button" onClick="mdlist();">
</form>
function clearAll(){
while (0< document.all.test.options.length) {
document.all.test.options[(document.all.test.options.length - 1)] = null;
}
}