/**
 * widget to highlight the various categories of products available for sale
 *
 *
 */
 
function showCategory(itemId){
	var leftMargin = (itemId) * -307;
	document.getElementById("categoryOverviewContainer").style.marginTop = leftMargin + "px";
	
	for(var i = 0;i < 6;i++){
		 document.getElementById("catSel" + i).style.backgroundColor = "#ffffff";
	}
	
	 document.getElementById("catSel" + itemId).style.backgroundColor = "#cccccc";
}