(function($) { 
      var cache = [];

      // Arguments are image paths relative to the current page. 
      $.preLoadImages = function() {
        var args_len = arguments.length; 
        for (var i = args_len; i--;) { 
          var cacheImage = document.createElement('img');
          cacheImage.src = arguments[i];
          cache.push(cacheImage);
        }
      }
    })(jQuery)
    $('document').ready(function() { 
         jQuery.preLoadImages(
		'http://www.leadingedge.com/images/slideshow/slideshow_image_2.jpg',
		
		'http://www.leadingedge.com/images/slideshow/slideshow_image_3.jpg',
		
		'http://www.leadingedge.com/images/slideshow/slideshow_image_4.jpg',
		
		'http://www.leadingedge.com/images/slideshow/slideshow_image_5.jpg',
		
		'http://www.leadingedge.com/images/pagination_active.png',
		'http://www.leadingedge.com/images/menu_onmouse.gif',
		'http://www.leadingedge.com/images/menu_trans_black.png',
		'http://www.leadingedge.com/images/menu_trans_blue.png',
		'http://www.leadingedge.com/images/button_hover.gif');
	$('#navigation li').mouseenter(function(){ 
              $(this).children('ul').css('display','block'); 
              $(this).children('a').addClass('hover_active'); 
         });
         $('#navigation li').mouseleave(function(){
              $(this).children('ul').css('display','none');
              $(this).children('a').removeClass('hover_active');
         });
    
    });