function toggleSizeType(itemId, imgId) {

	var itemObj = document.getElementById(itemId);
	var imgObj = document.getElementById(imgId);
	
	if (itemObj.style.display == "none") {
		itemObj.style.display = "block" ;
		imgObj.src = "images/nav_arrow_down.gif";
	}
	else {
		itemObj.style.display = "none";
		imgObj.src = "images/nav_arrow_right.gif";
	}

}

function toggleSubCat(item, subcatId) {
	
	var itemObj = document.getElementById(subcatId);

	if (itemObj.style.display == "none") {
		itemObj.style.display = "block" ;
		item.src = "images/nav_arrow_down.gif";
	}
	else {
		itemObj.style.display = "none";
		item.src = "images/nav_arrow_right.gif";
	}

}