active = 'nav1';

if (navigator.appVersion.substring(0,1) >=3)
{
	nav1		= new Image;
	nav1.src	= "images/nav/home.gif";
	nav2		= new Image;
	nav2.src	= "images/nav/contact.gif";
	nav3		= new Image;
	nav3.src	= "images/nav/stocklist.gif";
	nav4		= new Image;
	nav4.src	= "images/nav/special_offers.gif";
	nav1_a		= new Image;
	nav1_a.src	= "images/nav/home_a.gif";
	nav2_a		= new Image;
	nav2_a.src	= "images/nav/contact_a.gif";
	nav3_a		= new Image;
	nav3_a.src	= "images/nav/stocklist_a.gif";
	nav4_a		= new Image;
	nav4_a.src	= "images/nav/special_offers_a.gif";
}

function rollover(imgid,imgnew) 
{
	if (navigator.appVersion.substring(0,1) >=3) {
		if (imgid != active) {
			document.images[imgid].src=eval(imgnew + ".src");
		}
	}
}

function activate(imgid) 
{
	if (navigator.appVersion.substring(0,1) >=3) {

		document.images["nav1"].src=eval("nav1.src");
		document.images["nav2"].src=eval("nav2.src");
		document.images["nav3"].src=eval("nav3.src");
		document.images["nav4"].src=eval("nav4.src");
		document.images[imgid].src=eval(imgid + "_a.src");
		active = imgid;
		self.focus();
	}
}