var lastFaqClick = null;
window.onload=function() {
	var left_ul = document.getElementById("left_ul");
	var lis = left_ul.getElementsByTagName("li");
	for (var i = 0; li = lis[i]; i++) {
		var dt = li.getElementsByTagName("span")[0];//取得标题
		if (dt) {
			dt.id = "faq_dt_" + (Math.random() * 100);
			dt.onclick = function() {
				var p = this.parentNode;//取得父节点
				if (lastFaqClick != null && lastFaqClick.id != this.id) {
					var ul = lastFaqClick.parentNode.getElementsByTagName("ul")[0];
					ul.style.display='none';
				}
				lastFaqClick=this;
				var ul=p.getElementsByTagName("ul")[0];//取得对应子节点，也就是说明部分
				var tmpDisplay = 'none';
				if (gs(ul,'display') == 'none')
					tmpDisplay = 'block';
				ul.style.display = tmpDisplay;
			};
		}
	}
	
	//随机BANNER
	var now = new Date();
	var number = now.getSeconds() % 5;
	var obj = document.getElementById('head');
	var url = base + "/images/banner/" + number + ".jpg";
	obj.style.background = "url(" + url + ") no-repeat";
};

function gs(d,a) {
	if (d.currentStyle) {
		var curVal = d.currentStyle[a]
	} else {
		var curVal = document.defaultView.getComputedStyle(d, null)[a]
	}
	return curVal;
}