var curLyr;
  
  
  /*preload the images */
   pic1= new Image(230,69); 
 pic1.src="images/nav_apparel_img_off.jpg"; 
 
 pic2= new Image(230,69); 
 pic2.src="images/nav_bags_img_off.jpg"; 
 
 pic3= new Image(230,69); 
 pic3.src="images/nav_golf_img_off.jpg"; 
 
 pic4= new Image(230,69); 
 pic4.src="images/nav_headwear_img_off.jpg"; 
 
 pic5= new Image(230,69); 
 pic5.src="images/nav_misc_img_off.jpg"; 
 
 pic6= new Image(230,69); 
 pic6.src="images/nav_novelties_img_off.jpg"; 

 pic7= new Image(230,69); 
 pic7.src="images/nav_pens_img_off.jpg"; 
 
 pic8= new Image(230,69); 
 pic8.src="images/nav_wine_img_off.jpg"; 
 
 pic9= new Image(230,69); 
 pic9.src="images/nav_drinkware_img_off.jpg"; 
 
 pic10= new Image(230,69); 
 pic10.src="images/nav_executive_img_off.jpg"; 

  
    
  function lyrShow(id) {
     hideAllSelectedNavs();
     var lyr = getElemRefs(id);
     var img = getElemRefs(id + "_img")

     if (lyr && lyr.css) {
        lyr.css.visibility = "visible";
        lyr.css.display = "block";
     }
     if (img) {
        img.src = 'images/' + img.id + '_off.jpg'
     }
  }
  
     
  function lyrHide(id) {
     var lyr = getElemRefs(id);
     if (lyr && lyr.css) {
        lyr.css.visibility = "hidden";
        lyr.css.display = "none";
     }
  }
  
  function imgHide(id) {
    var img = getElemRefs(id);
    if (img) {
        img.src = 'images/' + img.id + '_on.jpg'
     }

  }
     
  function getElemRefs(id) {
     var el = (document.getElementById)? document.getElementById(id): (document.all)? document.all[id]: (document.layers)? getLyrRef(id,document): null;
     if (el) el.css = (el.style)? el.style: el;
     return el;
  }
  
   
  function getLyrRef(lyr,doc) {
     if (document.layers) {
        var theLyr;
        for (var i=0; i<doc.layers.length; i++) {
           theLyr = doc.layers[i];
           if (theLyr.name == lyr) return theLyr;
           else if (theLyr.document.layers.length > 0)
           if ((theLyr = getLyrRef(lyr,theLyr.document)) != null) return theLyr;
        }
        return null;
     }
  }
  
  function hideAllMaps() {
    lyrHide('nav_drinkware');
    lyrHide('nav_bags');
    lyrHide('nav_headwear');
    lyrHide('nav_executive');
    lyrHide('nav_novelties');
    lyrHide('nav_pens');
    lyrHide('nav_apparel');
    lyrHide('nav_golf');
    lyrHide('nav_wine');
    lyrHide('nav_misc');
  }
  
  function hideAllSelectedNavs() {
    imgHide('nav_drinkware_img');
    imgHide('nav_bags_img');
    imgHide('nav_headwear_img');
    imgHide('nav_executive_img');
    imgHide('nav_novelties_img');
    imgHide('nav_pens_img');
    imgHide('nav_apparel_img');
    imgHide('nav_golf_img');
    imgHide('nav_wine_img');
    imgHide('nav_misc_img');

  }