function toggleBackground(obj, divId, onOff){
	var divObj = document.getElementById(divId);
	var imgObj = document.getElementById("img" + divId);
	
	if (divObj.style.display == "none"){
		if (onOff == "on"){
			obj.style.backgroundImage = "url(/en/images/qb-comp-back-selected.jpg)";
			imgObj.src = "/en/images/open_dropdown_button2.jpg";			
		}
		else {
			obj.style.backgroundImage = "url(/en/images/qb-comp-back-closed.jpg)";				
			imgObj.src = "/en/images/close_dropdown_button.jpg";
		}			
	}
}