//用于登录的(inpt_name:登录名，inpt_pwd：密码)
function login(inpt_name,inpt_pwd)
{
    
    var username = document.getElementById(inpt_name).value;
    var pwd = document.getElementById(inpt_pwd).value;
    
    //var state = getchk();  //保持登录状态
  
    if(username=="")
    {
        alert('请输入登录名！');
        //$E(inpt_name).focus();
        return;
    }
    if(pwd=="")
    {
        alert('请输入密码！');
        //$E(inpt_pwd).focus();
        return ;
    }
    
    try
    {
        ajaxRead("../share/ajax.aspx?t=logininfo&user=" + escape(username)+"&passwd="+escape(pwd), "showlogininfo()");
    }
    catch(e)
    {
        alert('系统繁忙，请稍候重试！');
        return;
    }
    
}

//登录后显示的信息
function showlogininfo()
{
    
    var res = obj.getElementsByTagName('result');
	var result = "";
	
	if (res[0] != null && res[0] != undefined)
	{
		if (res[0].childNodes.length > 1) {
			result = res[0].childNodes[1].nodeValue;
		} else {
			result = res[0].firstChild.nodeValue;    		
		}
	}
	
	if(result=="0")
	{
	   alert('该用户信息不存在，请先注册！');
	   return;
	   //window.history.go(-1);
	}
	else if(result=="1")
	{
	   alert('用户名密码错误！');
	   return;
	   //window.history.go(-1);
	}
	
   window.location.href=window.location.href;
    
}

//保持状态
function getchk()
{
    var keptstate ='';
    
    if(document.getElementById("chkstate").checked)
    {
      keptstate = '1';
      document.getElementById("notice").innerHTML = "为了确保你的信息安全，请不要在网吧或者公共机房选择此项。"; 
    }
    else
    {
      keptstate = '0';
      document.getElementById("notice").innerHTML = "";
    }
    return keptstate;
}

//通用的方法
function $E() 
{ 
  var elements = new Array();
  for (var i = 0; i < arguments.length; i++) 
  { 
    var element = arguments[i]; 
    if (typeof element == 'string') 
      element = document.getElementById(element); 
    if (arguments.length == 1) 
      return element; 
    elements.push(element); 
  } 
  return elements; 
}