function getElementsByClass( searchClass, domNode, tagName){
	if (domNode == null) domNode = document;
	if (tagName == null) tagName = '*';
	var el = new Array();
	var tags = domNode.getElementsByTagName(tagName);
	var tcl = " "+searchClass+" ";
	for(i=0,j=0; i<tags.length; i++){
		var test = " " + tags[i].className + " ";
		if (test.indexOf(tcl) != -1)
			el[j++] = tags[i];
	}
	return el;
}

function showAll(){
	var infos=getElementsByClass("detail-info");
	for(i=0; i<infos.length; i++){
		infos[i].style.display = "";
	}
	resetAllLiClass();
	document.getElementById('li-info').className="goods_info_on";
	//隐藏收藏一栏
	document.getElementById('goods_shoucang').style.display = "none";
}
function resetAllLiClass(){
	var lists=getElementsByClass("goods_info_on");
	for(i=0; i<lists.length; i++){
		lists[i].className = "goods_info_off";
	}
}
function showOnlyInfo(idName,liId){
	resetAllLiClass();
	document.getElementById(liId).className="goods_info_on";
	var infos=getElementsByClass("detail-info");
	for(i=0; i<infos.length; i++){
		var id=infos[i].id;
		if(id==idName)
			infos[i].style.display = "";
		else
			infos[i].style.display = "none";
	}
	if(idName=='goods_shoucang')
		AddToFavorlist();
}