var i2009On = new Image(109,32); 
		i2009On.src="images/2009_on.gif"; 
		var i2009Off = new Image(109,32); 
		i2009Off.src="images/2009.gif"; 
		
		var i2008On = new Image(185,19); 
		i2008On.src="images/2008_on.gif"; 
		var i2008Off = new Image(185,19); 
		i2008Off.src="images/2008.gif"; 
		
		var i2007On = new Image(307,19); 
		i2007On.src="images/2007_on.gif"; 
		var i2007Off = new Image(307,19); 
		i2007Off.src="images/2007.gif"; 
				
		function changeImages(id, img){
			document.getElementById(id).src = img.src;
		}