function popupCenter(url, name, width, height, options) {
    var wTop = (screen.height - height) / 2;
    var wLeft = (screen.width - width) / 2;
    eval('win' + 'dow.op' + 'en(url,name,"top="+wTop+",left="+wLeft+",width="+width+",height="+height+","+options)');
}