var preLoad = false;

function preloadImages() {
	if(document.images) {
		button18Off = new Image();
		button18Off.src = "../nav_panel/normal/home.gif";
		button18On = new Image();
		button18On.src = "../nav_panel/over/home.gif";
		button19Off = new Image();
		button19Off.src = "../nav_panel/normal/what_is.gif";
		button19On = new Image();
		button19On.src = "../nav_panel/over/what_is.gif";
		button20Off = new Image();
		button20Off.src = "../nav_panel/normal/heirloom_knitting.gif";
		button20On = new Image();
		button20On.src = "../nav_panel/over/heirloom_knitting.gif";
		button21Off= new Image();
		button21Off.src = "../nav_panel/normal/knitting_charts.gif";
		button21On = new Image();
		button21On.src = "../nav_panel/over/knitting_charts.gif";
		button22Off = new Image();
		button22Off.src = "../nav_panel/normal/lace_patterns.gif";
		button22On = new Image();
		button22On.src = "../nav_panel/over/lace_patterns.gif";
		button23Off = new Image();
		button23Off.src = "../nav_panel/normal/trad_centres.gif";
		button23On = new Image();
		button23On.src = "../nav_panel/over/trad_centres.gif";
		button24Off = new Image();
		button24Off.src = "../nav_panel/normal/trad_borders.gif";
		button24On = new Image();
		button24On.src = "../nav_panel/over/trad_borders.gif";
		button25Off = new Image();
		button25Off.src = "../nav_panel/normal/trad_edgings.gif";
		button25On = new Image();
		button25On.src = "../nav_panel/over/trad_edgings.gif";
		button26Off = new Image();
		button26Off.src = "../nav_panel/normal/original_patterns.gif";
		button26On = new Image();
		button26On.src = "../nav_panel/over/original_patterns.gif";
		button27Off = new Image();
		button27Off.src = "../nav_panel/normal/finished_items.gif";
		button27On = new Image();
		button27On.src = "../nav_panel/over/finished_items.gif";
		button28Off = new Image();
		button28Off.src = "../nav_panel/normal/projects.gif";
		button28On = new Image();
		button28On.src = "../nav_panel/over/projects.gif";
		button29Off = new Image();
		button29Off.src = "../nav_panel/normal/miscellany.gif";
		button29On = new Image();
		button29On.src = "../nav_panel/over/miscellany.gif";
		button30Off = new Image();
		button30Off.src = "../nav_panel/normal/faqs.gif";
		button30On = new Image();
		button30On.src = "../nav_panel/over/faqs.gif";
		button31Off = new Image();
		button31Off.src = "../nav_panel/normal/trading_policy.gif";
		button31On = new Image();
		button31On.src = "../nav_panel/over/trading_policy.gif";
		button32Off = new Image();
		button32Off.src = "../nav_panel/normal/guide_p_and_p.gif";
		button32On = new Image();
		button32On.src = "../nav_panel/over/guide_p_and_p.gif";
		button33Off = new Image();
		button33Off.src = "../nav_panel/normal/place_an_order.gif";
		button33On = new Image();
		button33On.src = "../nav_panel/over/place_an_order.gif";
		button34Off = new Image();
		button34Off.src = "../nav_panel/normal/feedback_form.gif";
		button34On = new Image();
		button34On.src = "../nav_panel/over/feedback_form.gif";
		button35Off = new Image();
		button35Off.src = "../nav_panel/normal/emailme.gif";
		button35On = new Image();
		button35On.src = "../nav_panel/over/emailme.gif";

		//other buttons
		button40Off = new Image();
		button40Off.src = "../buttons/continue_blue/jamieson_and_smith.gif";
		button40On = new Image();
		button40On.src = "../buttons/continue_blue/jamieson_and_smith_over.gif";
		button41Off = new Image();
		button41Off.src = "../buttons/order_status/ord_status_normal.gif";
		button41On = new Image();
		button41On.src = "../buttons/order_status/ord_status_over.gif";
	}
	preLoad = true;
}