function limitpost()
{
 	if(document.form1.login_name.value == "")
 	{
 		alert("用户名不能为空");
 		return false;
 		
 	} 
 	else if(document.form1.pwd.value=="")
 	{
 		alert("密码不能为空");
 		return false;
 	}
}

var docEle = function() {
  return document.getElementById(arguments[0]) || false;
 }
  
 function openNewDiv(_id) {
  if (docEle(_id)) document.removeChild(docEle(_id));
  // 新激活图层
  var newDiv = document.createElement("div");
  newDiv.id = _id;
  newDiv.style.position = "absolute";
  newDiv.style.zIndex = "999";
  newDiv.style.width = "190px";
  newDiv.style.height = "130px";
  newDiv.style.top = "19px";
  newDiv.style.right = "11%";
  //newDiv.style.left = (parseInt(document.body.scrollWidth) - 300) / 2 + "px"; // 屏幕居中
  newDiv.style.background = "#353535";
  newDiv.style.border = "#CCCCCC 1PX solid";
  newDiv.innerHTML = '<form id="from1" name=form1 action="/Web/User/login.aspx" method=post onSubmit = "return limitpost();" style="z-index:-5"><table style="font-size:12px; margin-top:20px;z-index:-5" align="center" ><tr><td><img id="ming" src="../images/login_cion.gif" /><font color="#FFFFFF">&nbsp;<span id="yhm">用户名</span></font></td><td>&nbsp;<input name="login_name" type="text" class="text" size="12" value="" onfocus="1" /></td></tr><tr><td><img id="mima" src="../images/login_cion.gif" /><font color="#FFFFFF"><span id="mm">&nbsp;密&nbsp;&nbsp;码</span></font></td><td>&nbsp;<input name="pwd" type="password" class="text" size="12" value="" onfocus="2" /></td></tr><tr><td id="aa" height="10px"></td><td id="bb"></td></tr><tr><td valign="middle"><input name="deng" type="image" src="../images/login_anniu.gif" onfocus="3" alt="登录"/></td><td valign="middle"><a href="/Web/User/GetBackAccount.html" target="_blank"><image src="../images/login_wj.gif" name= "wang" border=0 alt="忘记密码 "/></a></td></tr></table></form>';
  document.body.appendChild(newDiv);
   //关闭层
   //alert(event.srcElement.id!=_id)
   	document.body.onmousedown=function()
	{	
	
	var obj =document.getElementById("newDiv");
	if (obj)
	{
		//var et = e.target || window.event.srcElement;
		//alert(event.srcElement.id);
		var ff = event.srcElement ? event.srcElement : event.target;
		//alert(ff.id)
		//alert(ff.id));
	if ((event.srcElement.id!="newDiv")&&(event.srcElement.name!="login_name")&&(event.srcElement.name!="pwd")&&(event.srcElement.name!="deng")&&(event.srcElement.id!="mima")&&(event.srcElement.id!="ming")&&(event.srcElement.name!="wang")&&(event.srcElement.id!="aa")&&(event.srcElement.id!="bb")&&(event.srcElement.id!="mm")&&(event.srcElement.id!="yhm"))
		{
			document.body.removeChild(docEle(_id));
		 return false;
		}
	}
  }
	
 }