<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';//這一句是關鍵
     document.getElementById("formid").submit();
}
</script>