function openwindow(TipUrl, width, height)
{
   var left = parseInt( ( screen.width - width ) /2 ); 
   var top = parseInt( ( screen.height - height ) /2 );
   newWin = window.open(TipUrl,"Radio","scrollbars=no,resizable=no,status=no,height=" +
            height + ",width=" + width + ",left=" + left + ",top=" + top);
}