function openWindow(theURL,winName,winWidth,winHeight,otherFeatures) {
   var x = 0;
   var y = 0;
   x = (screen.availWidth - 12 - winWidth) / 2;
   y = (screen.availHeight - 48 - winHeight) / 2;
   if (otherFeatures != "") {otherFeatures = "," + otherFeatures}
   var features = "screenX=" + x + ",screenY=" + y + ",width=" + winWidth + 
",height=" + winHeight+",top="+y+",left="+x+"'" + otherFeatures
   var NewWindow = window.open(theURL,winName,features);
   NewWindow.focus();
}