try:
<body onload="next('2.asp')">
<script>
function next(url){
document.form1.submit();
location = url;
}
</script>
<form name=form1 action=1.asp target="_blank" method=post>
<input>
</form>
<body onload="next('2.asp')">
<script>
function next(url){
document.form1.submit();
location = url;
}
</script>
<form name=form1 action=1.asp target="_blank" method=post>
<input>
</form>
加了alert(),可能是影响速度了