function WM_preloadImages() {

/*
WM_preloadImages()
Loads images into the browser's cache for later use.

Source: Webmonkey Code Library
(http://www.hotwired.com/webmonkey/javascript/code_library/)

Author: Nadav Savio
Author Email: nadav@wired.com

Usage: WM_preloadImages('image 1 URL', 'image 2 URL', 'image 3 URL', ...);
*/

  // Don't bother if there's no document.images
  if (document.images) {
    if (typeof(document.WM) == 'undefined'){
      document.WM = new Object();
    }
    document.WM.loadedImages = new Array();
    // Loop through all the arguments.
    var argLength = WM_preloadImages.arguments.length;
    for(arg=0;arg<argLength;arg++) {
      // For each arg, create a new image.
      document.WM.loadedImages[arg] = new Image();
      // Then set the source of that image to the current argument.
      document.WM.loadedImages[arg].src = WM_preloadImages.arguments[arg];
    }
  }
}





if (document.images) {            // Active Images
            historyon = new Image();      
            historyon.src = "nav/history_on.gif";

            foodon = new Image();      
            foodon.src = "nav/food_on.gif";

			drinkon = new Image();      
            drinkon.src = "nav/drink_on.gif";
            
            musicon = new Image();      
            musicon.src = "nav/music_on.gif";
            
            cottageson = new Image();      
            cottageson.src = "nav/cottages_on.gif";
            
            photoson = new Image();      
            photoson.src = "nav/photos_on.gif";            
            
            newson = new Image();      
            newson.src = "nav/news_on.gif";
            
            eventson = new Image();      
            eventson.src = "nav/events_on.gif";
            
            groupson = new Image();      
            groupson.src = "nav/groups_on.gif";
            
            historyoff = new Image();      
            historyoff.src = "nav/history_off.gif";

            foodoff = new Image();      
            foodoff.src = "nav/food_off.gif";

			drinkoff = new Image();      
            drinkoff.src = "nav/drink_off.gif";
            
            musicoff = new Image();      
            musicoff.src = "nav/music_off.gif";
            
            cottagesoff = new Image();      
            cottagesoff.src = "nav/cottages_off.gif";
            
            photosoff = new Image();      
            photosoff.src = "nav/photos_off.gif";            
            
            newsoff = new Image();      
            newsoff.src = "nav/news_off.gif";
            
            eventsoff = new Image();      
            eventsoff.src = "nav/events_off.gif";
            
            groupsoff = new Image();      
            groupsoff.src = "nav/groups_off.gif";
            

            
            
        }

// Function to 'activate' images.
function imgOn(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "on.src");
        }
}

// Function to 'deactivate' images.
function imgOff(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "off.src");
        }
}