function CenterWin(theURL) {
   var x=(screen.width-320)/2;
   var y=(screen.height-240)/2;
   //winpa='\'height='+he+',width='+wi+',top='+y+',left='+x;
   aaa = window.open("popup.htm?"+theURL,"obrazek",'height=320,width=240,top='+y+',left='+x+',resizable=yes,scrollbars=no,status=no');
   aaa.focus();
   return true;
}