<!--             
current_layer = "startLayer";

if (navigator.appName == "Netscape")  //setup netscape DOM types
 {  
  layerStyleRef="layer.";
  layerRef="document";             
  styleSwitch="";
 }
else
 {                                //setup IE DOM types
  layerStyleRef="layer.style.";
  layerRef="document.all";
  styleSwitch=".style";         
 }

function imgAct(imgName)
   {
    document[imgName].src=eval(imgName+"on.src");
    current_image = imgName;
   }
   
function imgInact(imgName)
   {
    document[imgName].src=eval(imgName+"off.src");
   }         

function showLayer(layerNum)
   {
    if (current_layer != "startLayer")
    { 
    hideCurrent();
    }
    new_layer = "layer" + layerNum;
    eval(layerRef+'["' + new_layer + '"]' + styleSwitch + '.visibility = "visible"');
    current_layer = new_layer;                  
   }  

function hideCurrent()
   {
    if (current_layer != "startLayer")
    {
     eval (layerRef+'["'+current_layer+'"]'+styleSwitch+'.visibility="hidden"');
    }
 }    
// -->