var MenuName = new Array('index','gaiyou','address','enkaku','sales','banner','link');

for(i in MenuName){
   var Name = MenuName[i];
   OnMenu[Name]  = new Image();
   OffMenu[Name] = new Image();
   OnMenu[Name].src  = docroot + "/en/company/img/local_" + Name + "_over.gif"; 
   OffMenu[Name].src = docroot + "/en/company/img/local_" + Name + ".gif";
}