var MenuName = new Array('tb_1','tb_2','tb_3','tb_4','tb_6','tb_7','tb_9');
var OnMenu   = new Array();
var OffMenu  = new Array();

for(i in MenuName){
   var Name = MenuName[i];
   OnMenu[Name]  = new Image();
   OffMenu[Name] = new Image();
   OnMenu[Name].src  = "/shared/" + Name + "_on.gif"; 
   OffMenu[Name].src = "/shared/" + Name + "_off.gif";
}

function WinOpen(url,width,height){
   var win = window.open(url,"_blank","toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,width=" + width + ",height=" + height + "\"");
   win.focus();
}
function ChgImage(name,flag){
      var img = document.images[name];
      img.src = (flag) ? OnMenu[name].src : OffMenu[name].src;
}