function openItem( itemname, mPage, target){
   if (mPage!='')  openURL(mPage,target)
   if (itemname!='') openURL("menu_"+itemname+".html","menuFrame");
}


function openURL( url , target) {
    if (target=="_top") {
        top.navigate(url);
    } else if (target=="dFrame") {
       var dFrame = window.parent.frames.dFrame;
       if (dFrame==null) {
           alert("map.openURL(). dFrame is null. Can't open URL=" + url);
         } else {         
          dFrame.navigate(url);
       }        
    } else if (target=="menuFrame") {
       var mFrame = window.parent.frames.menuFrame;
       if (mFrame==null){
           alert("map.openURL(). dFrame is null. Can't open URL=" + url);
       } else {         
          mFrame.navigate(url);
       }
    } else {
       alert("map.openURL(). unrecognised tafget frame: "+target);
    }
}


 function mouseMove(which)
      {
        var e;
        var color = ((which == "over") ? "yellow" : "");


        e = window.event.srcElement;


        while (e.tagName != "TD" && e.tagName != "TABLE")  e = e.parentElement;


        if (e.tagName == "TD")  e.style.backgroundColor = color;
      }