<script>
function formsubmit(){
document.formtest.action="formtest.jsp";
document.formtest.submit();
}
</script>
<form method="post" name="formtest">
<input type="hidden" name="userid" value="userid">
<input type="hidden" name="username" value="username">
<img src="imagesubmit.gif" border="0" onclick="formsubmit()">
</form>
