var a_nav = ['home', 'lines', 'new', 'order', 'events', 'about', 'contact'];
var e_img, s_name;
for (var i = 0; i < a_nav.length; i++) {
	s_name = a_nav[i];
	e_img = document.getElementById('nav-' + s_name);
	
	if (e_img && e_img.className != 'current') {
		e_img.onmouseover = function () { this.src = String(this.src.replace('normal', 'over')) };
		e_img.onmouseout  = function () { this.src = String(this.src.replace('over', 'normal')) };
		a_nav[i] = new Image ();
		a_nav[i].src = 'images/nav-' + s_name + '-over.gif';
	}
}