function popup(url, name, width, height){
    var oWindow = window.open(url, name, "height=" + height + ", width=" + width + ", top=100, left=100, resizable=yes, scrollable=yes, scrollbars=yes");
    if (oWindow == null) {
        alert("Your popup blocker won’t allow you access to this window.");
    } 
    else {
        //continue on
    }    
}