ns4 = (document.layers)? true:false

	ie4 = (document.all)? true:false

	nn6 = (document.getElementById)? true:false



	browserName = navigator.appName;

	browserVer = parseInt(navigator.appVersion);



	if (browserName == "Netscape" && browserVer >=3) {

 		version = "n3";

	} else if (browserName == "Microsoft Internet Explorer" && browserVer >=4) {

 		version = "n3";

	} else version = "n2";



//pre-load images

	if (version == "n3") {

		//number of total rollover images

        for (i=1; i<=7; i++) {

			eval ("nav"+i+"a=new Image ()");

			eval ("nav"+i+"a.src='images/nav"+i+"a.gif'");

			eval ("nav"+i+"i=new Image ()");

			eval ("nav"+i+"i.src='images/nav"+i+"i.gif'");

       	}

	}



	function high(imgnum)

		{

        if (version == "n3")

		eval("document.nav"+imgnum+".src=nav"+imgnum+"a.src");

		}



	function unhigh(imgnum)

		{

        if (version == "n3")

		eval("document.nav"+imgnum+".src=nav"+imgnum+"i.src");

		}

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		ordersheep_01_over = newImage("images/ordersheep_01-over.gif");
		preloadFlag = true;
	}
}