function popup(url){
    myWidth=700;
    myHeight=525;
    myLeft=30;
    myTop=30;
    myPopup=window.open(url,'demo','toolbar=yes,status=yes,resizable=yes,menubar=yes,scrollbars=yes,width='+myWidth+',height='+myHeight+',top='+myTop+',left='+myLeft+'');
    myPopup.focus();
    return  myPopup;
}