function OpenPopup(str) {
                searchWin = window.open(str,'pagina','scrollbars=no,resizable=no,width=500,height=400,status=no,location=no,toolbar=no');
                searchWin.refer = self;
        }
        
var theForm = document.forms['form1'];
if (!theForm) {
    theForm = document.form1;
}
function __doPostBack(eventTarget, eventArgument) {
    if (!theForm.onsubmit || (theForm.onsubmit() != false)) {
        theForm.__EVENTTARGET.value = eventTarget;
        theForm.__EVENTARGUMENT.value = eventArgument;
        theForm.submit();
    }
}