制作自适应弹出窗口

<Script language="JScript">
var w=screen.availWidth-10;
var h=screen.availHeight-30;
var objwin = window.open(index.asp,"OAMAIN","fullscreen=0,toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=1,width=" + w + ",height=" + h + ",top=0,left=0",true);
window.opener=null;
window.close();
</script>