submit a form in a popup

[xhunter]

Ok,
I hope I can get some help here,

Basically what I want to do, is to have my form to be submitted to a popup,
no problem there,
the problem is,

I want to initiate this from a button that is pressed on Another form, but no matter what I get it to open on another page not the popup.

something like :

 
function popup(){
window.open("", "newwin", "width=750,height=600,scrollbars=yes,resizable=yes");
document.2ndform.submit();
}
 
<from name="1stform">
<input value ="button" type="button" onclick="popup()">
</form>
 
<form name="2ndform" method="POST" action="xxx" target="newwin"  onsubmit="window.open("", "newwin", "width=750,height=600,scrollbars=yes,resizable=yes")">
</form>
 

when I use the "document.2ndform.submit();", the "onsubmit" of the 2nd form is skipped, and even if I open the popup in the function before submitting, the form is not targeted to that pop up, instead a new page opens.

[xhunter]

Problem Solved.
thankx.