<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <script>
function f(sel1)
{
var sel2=document.getElementById('select2');
var i=sel2.selectedIndex>0 ?sel2.selectedIndex :0;
var name =sel2.options[i].innerHTML;
var tmp=new Option(name,sel2.value);
sel1.options[0]=tmp;
sel2.style.display='inline';
sel1.style.width=sel2.offsetWidth;
sel2.focus();
}
function c(sel2)
{
var sel1=document.getElementById('select1');
var i=sel2.selectedIndex>0 ?sel2.selectedIndex :0;
var name =sel2.options[i].innerHTML;
var temp=new Option(name,sel2.value);
sel1.options[0]=temp;
sel2.style.display="none";
}
</script>
</head>
<body>
<select id="select1" onFocus="f(this)">
<option>dhh </option>
</select> <br>
<select id="select2" name="select" size="5" style="display:none;z-index:2; position:absolute;" onChange="c(this)" onBlur="this.style.display='none'">
<option>dhh </option>
<option>bbb </option>
<option>3 </option>
<option>4 </option>
<option>5 </option>
<option>6 </option>
<option>7 </option>
<option>8 </option>
<option>9 </option>
<option>10 </option>
</select>
</body>
</html>
