<script>
<form class="form-horizontal" id="formid" action="${base}/cmn/report!exp.action" method="post" >
</form>
function expInf(){
var newwin=window.open('','_self','width=200,height=100');
document.getElementById("formid").target = 'newWindow';//这一句是关键
document.getElementById("formid").submit();
}
</script>