if (document.images) {
menu1_off = new Image(); menu1_off.src = "images/menu1.gif";
menu1_over = new Image(); menu1_over.src = "images/menu1_over.gif";
menu2_off = new Image(); menu2_off.src = "images/menu2.gif";
menu2_over = new Image(); menu2_over.src = "images/menu2_over.gif";
menu3_off = new Image(); menu3_off.src = "images/menu3.gif";
menu3_over = new Image(); menu3_over.src = "images/menu3_over.gif";
menu4_off = new Image(); menu4_off.src = "images/menu4.gif";
menu4_over = new Image(); menu4_over.src = "images/menu4_over.gif";
menu5_off = new Image(); menu5_off.src = "images/menu5.gif";
menu5_over = new Image(); menu5_over.src = "images/menu5_over.gif";
menu6_off = new Image(); menu6_off.src = "images/menu6.gif";
menu6_over = new Image(); menu6_over.src = "images/menu6_over.gif";
menu7_off = new Image(); menu7_off.src = "images/menu7.gif";
menu7_over = new Image(); menu7_over.src = "images/menu7_over.gif";
}

function turn_off(ImageName) {
	if (document.images != null) {
		document[ImageName].src = eval(ImageName + "_off.src");
	}
}

function turn_over(ImageName) {
	if (document.images != null) {
		clearAllSubs();
		document[ImageName].src = eval(ImageName + "_over.src");
		document[ImageName + "_sub"].style.display = "inline";
	}
}

function clearAllSubs()
{
	document["menu1_sub"].style.display = "none";
	document["menu2_sub"].style.display = "none";
	document["menu3_sub"].style.display = "none";
	document["menu4_sub"].style.display = "none";
	document["menu5_sub"].style.display = "none";
	document["menu6_sub"].style.display = "none";
	document["menu7_sub"].style.display = "none";
}