var lightOff = new Image()
var lightOn = new Image()
var isNav4,   isIE4 ;
var range = "";
var styleObj = "";
if (navigator.appVersion.charAt(0) == "4") {
	if  (navigator.appName == "Netscape"){
		isNav4 = true
	} else {
		isIE4 = true
		range = ".all"
		styleObj = ".style"
	}
}
function changeImage(pos, menuitem, onOff) {
lightOff.src = menuitem + "1.png" 
lightOn.src = menuitem + "2.png"

if (isNav4) {		
	var newImg =  eval ("document.pole" + pos + ".document.images[0]")
}
if (isIE4) {
	var newImg = eval ("document.all.pos" + pos ) 
}
	if (onOff == "off") {
		onOff = "on";
		newImg.src = lightOn.src;
	} else {
		onOff = "off";
		newImg.src = lightOff.src;
	}
	return;
}

	// alterError - fixes a rounding bug in Netscape 2
	function alterError(value) {
		if (value<=0.99) {
			newPounds = '0';
		} else {
			newPounds = parseInt(value);
		}
		newPence = parseInt((value+.0008 - newPounds)* 100);
		if (eval(newPence) <= 9) newPence='0'+newPence;
		newString = newPounds + '.' + newPence;
		return (newString);
	}

	// buyItem - adds an item to the shooping basket
	function buyItem(newItem, newPrice, newQuantity) {
		if (newQuantity <= 0) {
			rc = alert('The quantity entered is incorrect');
			return false;
		}
		//if (confirm('Add '+newQuantity+' x '+newItem+' to basket')) {
			index = document.cookie.indexOf("TheBasket");
			countbegin = (document.cookie.indexOf("=", index) + 1);
        		countend = document.cookie.indexOf(";", index);
	        	if (countend == -1) {
        	    		countend = document.cookie.length;
        		}
	                document.cookie="TheBasket="+document.cookie.substring(countbegin, countend)+"["+newItem+","+newPrice+"#"+newQuantity+"]";
		
		return true;
		//}
		
			//return false;
		
	}

	// resetShoppingBasket - resets to shopping basket to empty
	function resetShoppingBasket() {
		index = document.cookie.indexOf("TheBasket");
		document.cookie="TheBasket=.";
		document.cookie="myPw1=";
		document.cookie="myPw2=";

	}
	
function findItem(itemtoFind) {
	index = document.cookie.indexOf("TheBasket");
	countbegin = (document.cookie.indexOf("=", index) + 1);
        countend = document.cookie.indexOf(";", index);
        if (countend == -1) {
        	countend = document.cookie.length;
        }
	fulllist = document.cookie.substring(countbegin, countend)
	itemlist = 0;
	for (var i = 0; i <= fulllist.length; i++) {							if (fulllist.substring(i,i+1) == '[') {
			itemstart = i+1;
		} else if (fulllist.substring(i,i+1) == ']') {
			itemend = i;
			itemlist=itemlist+1;
			} else if (fulllist.substring(i,i+1) == ',') {
				theitem = fulllist.substring(itemstart, i);	
				itemstart = i+1;			
				if (itemtoFind == theitem){
					itemlist=itemlist+1;
					return itemlist;
				}
			}		
		}
	return false;
	}
function removeItem(itemno) {
		newItemList = null;
		itemlist = 0;
		for (var i = 0; i <= fulllist.length; i++) {
			if (fulllist.substring(i,i+1) == '[') {
				itemstart = i+1;
			} else if (fulllist.substring(i,i+1) == ']') {
				itemend = i;
				theitem = fulllist.substring(itemstart, itemend);
				itemlist=itemlist+1;
				if (itemlist != itemno) {
					newItemList = newItemList+'['+fulllist.substring(itemstart, itemend)+']';
				}
			}
		}
		index = document.cookie.indexOf("TheBasket");
		document.cookie="TheBasket="+newItemList;
		
	}
function gotoBack(){
top.frames[1].location = "mainindex.html"
}