function openDemo(htmlFile,htmlWidth,htmlHeight) {
 var bua = navigator.userAgent;
 s = 'resizable=0,toolbar=0,menubar=0,scrollbars=0,status=0,location=0,directory=0,width=350,height=200';
 if (bua.indexOf("Opera")!= -1) {
   window.open(htmlFile+".htm",'','width='+htmlWidth+',height='+htmlHeight+',top=10,left=10');
 }
 else {
   window.open(htmlFile+".htm",'','width='+htmlWidth+',height='+htmlHeight+',top=10,left=10');
 }
}