if (navigator.appVersion.substring(0,1) >= 3) version= "3";
else version = "2"

if (version=="3") {	
		img1_rover = new Image();
		img1_rover.src = "images/_resources_links_on.gif";
		img1_roff = new Image();
		img1_roff.src = "images/_resources_links_off.gif";
		
		img2_rover = new Image();
		img2_rover.src = "images/_resources_purchase_on.gif";
		img2_roff = new Image();
		img2_roff.src = "images/_resources_purchase_off.gif";

		
	}

	function imgOver(imgName) {
			if (version=="3") {
				document[imgName].src = eval(imgName + "over.src");	   
			}
	}

	function imgOff(imgName) {
			if (version=="3") {
				document[imgName].src = eval(imgName + "off.src");		
			}
	}