function viewAllCategory(obj,id)
{
	target = document.getElementById('subCat' + id);
	if(target.style.display == "block"){
		obj.style.background="transparent url('/design/plus.gif') no-repeat 50% 50%";
		target.style.display="none";
	} else {
		obj.style.background="transparent url('/design/moins.gif') no-repeat 50% 50%";
		target.style.display="block";
	}
}