function OpenTennisTicker() {
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/dtbliga/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);
}