function newWindow(url){
    var leftPos = ((screen.width - 1000) / 2);
    var topPos = ((screen.height - 700) / 2);
    var randomWindowName = Math.floor((Math.random() * 999999));
    randomWindowName = "w" + randomWindowName; // create a new random window name
    window.open(url,randomWindowName,"width=1000,height=700,left="+leftPos+",top="+topPos+",toolbar=no,location=no,status=yes,scrollbars=yes,resizable=yes");
    return;
}