function OpenGMSTicker() {     
   var width = 640;
   var height = 614;
 
   var leftMarg = (screen.availWidth - width)/2;
   var topMarg= (screen.availHeight - height)/2;
 
   var ttURL = "http://www.tennisscores.de/livescore/dtbhgms/livescorer.html";   
   window.open(ttURL,"_TennisTickerLS",'top=' + topMarg + ',left=' + leftMarg + ',menubar=0,toolbar=0,location=0,directories=0,status=0,scrollbars=0, width=' + width +', height=' + height);
}