var ad_img =[
	["ad_0.jpg","新编全医药学大词典","http://www.medscape.com.cn/product/meddic.jsp"],
	["ad_1.jpg","新编临床用药参考","http://www.medscape.com.cn/product/drugref.jsp"],
	["ad_2.jpg","医学文献王","http://www.medscape.com.cn/product/medref.jsp"],
	["ad_3.jpg","医脉通","http://www.medlive.cn/service/help.php"],
	["ad_4.jpg","医学导航","http://www.meddir.cn/"],
	["ad_5.jpg","用人人网账号登录","http://www.medlive.cn/forum/topic_view.php?topic_id=25561"]
];
function showTab(a, b) {
	if($("ul_" + a)) {
		var elementarr = $("ul_" + a).getElementsByTagName("li");
		if(elementarr) {
			for(var i=0; i<elementarr.length; i++) {
				elementarr[i].className = "";
			}
		}
		$("li_"+ a +"_" + b).className = "tab_on";
	
		elementarr = $("container_" + a).getElementsByTagName("div");
		if(elementarr) {
			for(var i=0; i<elementarr.length; i++) {
				var element = elementarr[i];
				Element.toggle(element);
			}
		}
	}
}

function toggleDiv(divid) {
	if($(divid)) {
		var imgsrc = $("img_"+divid).src;
		if(imgsrc.indexOf("minus.gif")>=0) {
			$("img_"+divid).src="image/plus.gif";
			$("img_"+divid).title="更多...";
		} else {
			$("img_"+divid).src="image/minus.gif";
			$("img_"+divid).title="隐藏...";
		}
		divid="div_"+divid;
		Element.toggle(divid);
	}
}

function resizeResImages(){
	//预设的图片最大宽度
	var maxwidth=500; 
	var myimg,oldwidth,oldHeight; 
	var digest = document.getElementById('div_digest');
	if(digest) {
		var imgs = digest.getElementsByTagName('img');
		for(i=0;i <imgs.length;i++){
			myimg = imgs[i]; 
			if(myimg.width > maxwidth){ 
				oldwidth = myimg.width; 
				oldHeight = myimg.height;
				myimg.width = maxwidth; 
				myimg.height = oldHeight * (maxwidth/oldwidth); 
			}
		}
	}
}