function createDownBlock(ev) 
{
	ev  =  ev  ||  window.event; // 事件     
    var  src    =  ev.target  ||  ev.srcElement; // 获得事件源
	if(src.tagName.toUpperCase() !="A") src = src.parentNode;
	name = src.getAttribute('title');
	url = src.getAttribute('rel');
	pre = src.getAttribute('pre')?src.getAttribute('pre'):'';
	
	
	if(url == "" || url =="javascript;")
	{
	  alert("下载地址为空");	
	}


	
	if(!document.getElementById("down_box")) {
		var down_box = document.createElement("div");
		down_box.id = "down_box";
		var bodys = document.body;
		bodys.appendChild(down_box);
	} else {
		down_box = document.getElementById("down_box");
	}
	down_box.style.top = document.documentElement.scrollTop + 150 + "px"; 
	down_box.innerHTML = "<a href='http://www.huiger.com' target='_blank'><img class='pop_ad' src='" +  pre +"/images/down.gif' alt='慧革尔科技' /></a><h2>" + " 下载：" + name +"</h2><p><a href=" + url + "><img src='" + pre +"/images/down/down_pop_dianxin.gif' alt='下载' /></a></p>";
	var closeLink = document.createElement("a");
	closeLink.href = "#";
	closeLink.title = "关闭";
	closeLink.innerText = "关闭"
	closeLink.className = "down_pop_close";
	closeLink.onclick = closeDownBlock;
	down_box.appendChild(closeLink);
	return false;
}

function closeDownBlock() {
	var bodys = document.body;
	bodys.removeChild(this.parentNode);
	return false;
}