function PopUpWindow(URL,w1,h1) {
      day = new Date();
      id = day.getTime();
      var posX = ((screen.availWidth / 2) - w1 / 2);
      var posY = ((screen.availHeight / 2) - h1 / 2);
         eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=1,width="+w1+",height="+h1+",left="+posX+",top="+posY+"');");
   };