<script type="text/javascript">
    function check(){
        document.myform1.submit();
        document.myform2.submit();
        document.myform3.submit();
                ...  ...
    }
</script>

------解决方案--------------------
<form action="...." method="post">
 <input type="button" value="提交" onClick="submitted()">
</form>


Javascript:
<script type="text/javascript">

function submitted(){
  documnet.forms[0].action = "....";
  documnet.forms[0].submit();
}

</script>