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

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

			function showLayer(subname)		
			{
			if(document.all)
			   {
			    document.all["Layer1"].style.visibility="hidden";
			    document.all["Layer2"].style.visibility="hidden";
			    document.all[subname].style.visibility="visible";
				}
			else if(document.layers)
				{
					document.layers["Layer1"].visibility="hide";
					document.layers["Layer2"].visibility="hide";
					document.layers[subname].visibility="show";
				}
			}

			function hiddenLayer(subname)		
			{
			if(document.all)
			   {
			    document.all["Layer1"].style.visibility="hidden";
			    document.all["Layer2"].style.visibility="hidden";
			  		document.all[subname].style.visibility="hidden";
				}
			else if(document.layers)
				{
					document.layers["Layer1"].visibility="hide";
					document.layers["Layer2"].visibility="hide";
					document.layers[subname].visibility="hide";
				}
			}