// função redes imagens 

		var images_num = 206;
		var delay = 2000;
		var suffix = ".jpg";
		var bottomImageName = "bottom";
		
		var userAgent = window.navigator.userAgent;
		var browserVersion = parseInt(userAgent.charAt(userAgent.indexOf("/")+1),10);
		
		function isExplorer(){
		//alert('isExplorer');
			return userAgent.indexOf("MSIE") > 0;
		}
		
		function getElement(name,layer){
		//alert('getElement');

			if (browserVersion < 4) return document[name];
			var curDoc = layer ? layer.document : document;
			var elem = curDoc[name];
			if (!elem)
			{
				for (var i=0;i<curDoc.layers.length;i++)
				{
					elem = getElement(name,curDoc.layers[i]);
					if (elem) return elem;
				}
			}
			return elem;
		}
		
		function getImage(name){
			return (!isExplorer()) ? getElement(name,0) : document[name];
		}

		count = 0;
		function loadImage(){
		count++;
			which = Math.floor(Math.randoms()*images_num);
			var bottomImage = getImage(bottomImageName);
			bottomImage.src = image_root+which+suffix;
		}

		function notifyLoad(source){
			if(ie || ns){setTimeout("loadImage()",delay);}
			if(ns6){setInterval("loadImage()",4000);}
		}