var bCLocked, bTLocked, bFLocked, bBLocked;

bCLocked = false;
bTLocked = false;
bFLocked = false;
bBLocked = false;

function imgSwap(imgid, idx) {
	if (idx == 1)
		document.getElementById(imgid).src = "images/"+ imgid +"_on.gif"
	else if (!(imgid == "subnav_clothing" && bCLocked) && !(imgid == "subnav_toys" && bTLocked) && !(imgid == "subnav_furniture" && bFLocked) && !(imgid == "subnav_books" && bBLocked))
		document.getElementById(imgid).src = "images/"+ imgid +"_nml.gif";
}

function allOff() {
	document.getElementById("subnav_clothing").src = "images/subnav_clothing_nml.gif";
	document.getElementById("subnav_toys").src = "images/subnav_toys_nml.gif";
	document.getElementById("subnav_furniture").src = "images/subnav_furniture_nml.gif";
	document.getElementById("subnav_books").src = "images/subnav_books_nml.gif";

	bCLocked = false;
	bTLocked = false;
	bFLocked = false;
	bBLocked = false;
}

function swapHero(imgname) {
	document.getElementById("mainimg").src = "images/bg_"+ imgname +".jpg";
	allOff();
	document.getElementById("subnav_"+imgname).src = "images/subnav_"+ imgname +"_on.gif";
	
	if (imgname == "clothing")
		bCLocked = true;
	else if (imgname == "toys")
		bTLocked = true;
	else if (imgname == "furniture")
		bFLocked = true;
	else if (imgname == "books")
		bBLocked = true;
}