var chk = navigator.userAgent.indexOf("Mozilla/3")>= 0 || navigator.userAgent.indexOf("Mozilla/4")>= 0;
	
	if ( chk )	{
		var product1_on=new Image();
		var product1_off=new Image();		
		var product2_on=new Image();
		var product2_off=new Image();
		var product3_on=new Image();
		var product3_off=new Image();
		            		
		product1_off.src="images/vs_ev_evp/vs.gif";
		product1_on.src="images/vs_ev_evp/vs_on.jpg";
		product2_off.src="images/vs_ev_evp/ev.gif";
		product2_on.src="images/vs_ev_evp/ev_on.jpg";
		product3_off.src="images/vs_ev_evp/evp.gif";
		product3_on.src="images/vs_ev_evp/evp_on.jpg";
		

	}

	function changeImage(oldImage, newImage) 
	{
		oldImage.src=newImage.src;
	}