function changeOpacity(obj_div){
	var sub_divs = document.getElementById('promoUl').getElementsByTagName('li');
	for(var i = 0; i < sub_divs.length ; i ++ ){
		if(sub_divs[i].id.indexOf('li_')>-1){
			if(sub_divs[i]==obj_div){
				obj_div.className='promoItem';
			}else{
				sub_divs[i].className='promoItem disabled';
			}
		}
	}
}

function resetOpacity(){
	var sub_divs = document.getElementById('promoUl').getElementsByTagName('li');
	for(var i = 0; i < sub_divs.length ; i ++ ){
		if(sub_divs[i].id.indexOf('li_')>-1){
				sub_divs[i].className='promoItem';
		}
	}
}


function loadBack(color){
if(color=="") color="cat00002";
//if(color > "cat00007" && color !="cat00102") color="cat00002";

document.body.className="bg_"+color;
}