var   xmlHttp;
  function   createXMLHttpRequest()   {     
  if   (window.ActiveXObject)   {     
  xmlHttp   =   new   ActiveXObject("Microsoft.XMLHTTP");     
  }     
  else   if   (window.XMLHttpRequest)   {     
  xmlHttp   =   new   XMLHttpRequest();     
  }     
  }     
  function   startRequest()   {     
   var url;
   createXMLHttpRequest();
   
      if(document.getElementById("username").value=="")
   {
      document.getElementById("username").focus();
      alert('请输入用户名！');
	  return false;
   }
   if(document.getElementById("userpass").value=="")
   {
      document.getElementById("userpass").focus();
      alert('请输入密码！');
	  return false;
   }
   
   url="loginx.asp?action=login&username="+document.getElementById('username').value   + "&userpass=" +   document.getElementById('userpass').value;
  //document.getElementById("results").innerHTML  =url;
      
  xmlHttp.onreadystatechange   =   handleStateChange;     
  xmlHttp.open("POST",url,true);     
  xmlHttp.send(null);    
  }     
    
  function   handleStateChange()   { 
  
  var strTemp="";
  if(xmlHttp.readyState   ==   4)
  
  {     
	  if(xmlHttp.status   ==   200) 
	  {   
	    
		  if(xmlHttp.responseText =="False")
		  {
		     alert('用户名或密码错误！');
		  
		  }
		  else
		  {
		  
				strTemp=strTemp+"欢迎您,"+document.getElementById('username').value +",<a href=\/user\/>管理中心<\/a>,";
				strTemp=strTemp+"<a href=\/user\/logout.asp>退出<\/a>";
		        document.getElementById("results").innerHTML   = strTemp;  
		  
		  }
	   }     
     }     
  }     


function userLogin()
{
    document.getElementById("results").innerHTML="<img src=images/\loading.gif>正在加载，请稍后..."
    var strTemp="";
    
	strTemp=strTemp+"<form action=?action=login method =post>";
	strTemp=strTemp+"用户名：<input style=\"height:20;width:100\" name=\"username\" type=\"text\" id=\"username\" size=\"30\" >";
	strTemp=strTemp+"密&nbsp;&nbsp;码：<input style=\"height:20;width:100\" name=\"userpass\" type=\"password\"  id=\"userpass\"  size=\"30\" >";
	strTemp=strTemp+"<input type=\"button\" value=\"登录\" name=\"B1\" onclick =\"startRequest();\"> <input type=\"button\" value=\"注册\" name=\"B1\" onclick =\"window.location='/register.asp';\">";
	strTemp=strTemp+"<\/form>";
	
	document.getElementById("results").innerHTML=strTemp;
	
}