var menuBtns = new Array('about', 'wines', 'visit', 'shop', 'club', 'privateevents', 'home');

// shortcuts for img src naming
var m = "img/menu/";
var f = "_off";
var v = "_over";
var g = ".gif";

//preload mouseover and mouseout menu images into separate arrays
var btnsOff = new Array();
var btnsOver = new Array();
for (var i = 0; i < menuBtns.length; i++) {
	btnsOff[i] = new Image();
	btnsOff[i].src = m + menuBtns[i] + f + g;
	btnsOver[i] = new Image();
	btnsOver[i].src = m + menuBtns[i] + v + g;
}


function btnOut(btnName) {
		var z = indexFind(menuBtns, btnName);
		document[btnName].src = btnsOff[z].src;
}

function btnOver(btnName) {
		var z = indexFind(menuBtns, btnName);
		document[btnName].src = btnsOver[z].src;
}

function indexFind(theArray, theMember) {
	var j = -1;
	for (var i=0; i<theArray.length; i++) {
		if (theArray[i] == theMember) {
			j = i;;
		}
	}
	return j;
}