if (document.images)
  {
  
    contactusbutton = new Image();
    contactusbutton.src = "images/navbuttons_lg/button_contactus.jpg";
    
    contactusbuttonglow = new Image();
    contactusbuttonglow.src = "images/navbuttons_lg/button_contactus_g.jpg";
    
    crewbutton = new Image();
    crewbutton.src = "images/navbuttons_lg/button_crew.jpg";
    
    crewbuttonglow = new Image();
    crewbuttonglow.src = "images/navbuttons_lg/button_crew_g.jpg";
    
    pollsbutton = new Image();
    pollsbutton.src = "images/navbuttons_lg/button_polls.jpg";
    
    pollsbuttonglow = new Image();
    pollsbuttonglow.src = "images/navbuttons_lg/button_polls_g.jpg";

    previousshowsbutton = new Image();
    previousshowsbutton.src = "images/navbuttons_lg/button_previousshows.jpg";
    
    previousshowsbuttonglow = new Image();
    previousshowsbuttonglow.src = "images/navbuttons_lg/button_previousshows_g.jpg";
    
    whosonbutton = new Image();
    whosonbutton.src = "images/navbuttons_lg/button_whoson.jpg";
    
    whosonbuttonglow = new Image();
    whosonbuttonglow.src = "images/navbuttons_lg/button_whoson_g.jpg";
    
    contactustext = new Image();
    contactustext.src = "images/navbuttons_lg/text_contactus.jpg";
    
    crewtext = new Image();
    crewtext.src = "images/navbuttons_lg/text_crew.jpg";
    
    pollstext = new Image();
    pollstext.src = "images/navbuttons_lg/text_polls.jpg";

    previousshowstext = new Image();
    previousshowstext.src = "images/navbuttons_lg/text_previousshows.jpg";

    whosontext = new Image();
    whosontext.src = "images/navbuttons_lg/text_whoson.jpg";
    
    blanktext = new Image();
    blanktext.src = "images/navbuttons_lg/blanktext.jpg";
    
   }

function hotspoton(imgName)
   {
    if (document.images)
     { 
       document.images[imgName].src = eval(imgName + "buttonglow.src");
       document.images["buttontext"].src = eval(imgName + "text.src");
     }
   }
   
function hotspotoff(imgName)
   {
    if (document.images)
     {
      document.images[imgName].src = eval(imgName + "button.src");
      document.images["buttontext"].src = blanktext.src;
     }
   }