window.onload = function(){
	var folder = "tipos/";
	var navBtnStrs = new Array('nvNew', 'nv308', 'nv360', 'nvMondial', 'nv456', 'nv348', 'nvflat12', 'nv355', 'nv430', 'nvother', 'nvCCars');

	setUpNav(navBtnStrs, folder);
}


function setUpNav(navBtnStrs, folder){
	var navBtns = new Array();
	for(var i in navBtnStrs){
		var navBtn = new NavElement(navBtnStrs[i], folder);
		navBtns[navBtnStrs[i]] = navBtn;
	}
}


function navImage(id, folder){
	var baseFolder = folder;
	this.imgOn = new Image();
	this.imgOn.src = baseFolder + id + "_on.gif";
	this.imgOff = new Image();
	this.imgOff.src = baseFolder + id + ".gif";
}

function NavElement(id, folder){
	this.id = id;
	if(document.getElementById && document.getElementById(id)){
		var domEl = document.getElementById(id);
		domEl.NavElement = this;
		if (document.images) {
			this.imgObj = new navImage(id, folder);
			domEl.onmouseover = NavElement.eMouseOver;
			domEl.onmouseout = NavElement.eMouseOut;
		}
	}
}
NavElement.eMouseOver = function(e){
	document.getElementById(this.id).src = this.NavElement.imgObj.imgOn.src;
}
NavElement.eMouseOut = function(e){
	document.getElementById(this.id).src = this.NavElement.imgObj.imgOff.src;
}