function getCookie(firstname,secondname)//取cookies函数
{
    var   dc   =   document.cookie; 
//alert(dc);
    var   fbegin=dc.indexOf(firstname+"=");
    if(fbegin<0)
      return null;
    //alert(fbegin);
    var   fend=dc.indexOf(";",fbegin);
    //alert(fend);
    if(fend==-1)
      fend=dc.length;
    //alert(fend);
    var   prefix=secondname+"=";
    var   begin=dc.indexOf(prefix,fbegin); 
    //alert(begin);
    var   end=-1;
    var   end1=document.cookie.indexOf( ";",begin); 
    var   end2=document.cookie.indexOf( "&",begin);
    //alert(end1);
    //alert(end2);
      if(end1==-1&&end2==-1)
         end=dc.length;
      else
      {
         if(end1>=0&&end2<0)
         end=end1;
         else if(end1<0&&end2>=0)
         end=end2;
         else if(end1<0&&end2<0)
         end=dc.length;
         else if(end1>end2)
         end=end2;
         else if(end2>end1)
         end=end1;
         else
         end=dc.length;
      }
     // alert(end);
      if(fbegin<=begin&&fend>=end)
      {
        var value=dc.substring(begin +prefix.length,end);
        if(value==null||value=="")
            return null;
        else
         return decodeURI(dc.substring(begin +prefix.length,end));
      }
      else
      return null;
}


function delCookie(firstname,secondname)//删除cookie
{
    var exp = new Date();
    exp.setTime(exp.getTime() - 10000);
    var cval=getCookie(firstname,secondname);
    if(cval!=null)
	document.cookie= firstname+"=;expires="+exp.toGMTString()+";domain=datihu.com;path=/";
}

function showdiv(type)  //true 是现实要登录，false是要注销
{
   
   if(type)
   {
    var str=getCookie('user','realname');
    if(str!=null&&str!="")
    {
        document.getElementById('dlogin').style.display='block';
        document.getElementById('dunlogin').style.display='none';
        document.getElementById('spusername').innerHTML="你好,<b>"+str+"</b>!";
        showmessagetooltip();//登陆状态，显示他是否有短消息;
    }
     else
        {
            str=getCookie('user','name');
            if(str!=null&&str!="")
            {
             document.getElementById('dlogin').style.display='block';
             document.getElementById('dunlogin').style.display='none';
              document.getElementById('spusername').innerHTML="你好,<b>"+str+"</b>!";
              showmessagetooltip();//登陆状态，显示他是否有短消息;
            }
             else
              {
              document.getElementById('dunlogin').style.display='block';
              document.getElementById('dlogin').style.display='none';
              document.getElementById('spusername').innerHTML="用户名";
              }
        }
   }
   else
   {
        delCookie('user','name');
        document.getElementById('dunlogin').style.display='block';
        document.getElementById('dlogin').style.display='none';
        document.getElementById('spusername').innerHTML="用户名";
        window.location.reload();
   }
}

function autosearch(key)  //实现按下回车键，自动相应搜索事件
{
    if (key==13) 
    {
        if(document.getElementById("searchtxt").value!="")
        {
            var desurl="http://group.datihu.com/search/searcharticle.aspx?page=1&sk="+escape(document.getElementById("searchtxt").value);
            window.location.href =desurl;
        }
        else
        {
            alert('请您输入搜索内容再进行搜索');
        }
    }
}
function showmessagetooltip()   //显示是否有新短消息
{
    var str=getCookie('user','newmessage');
    if(str!=null&&str!=""&&str=="1")
    {
        document.getElementById('dmessagetooltip').style.display='block';
        document.getElementById('bgsmessagetooltip').src="media/msg.mp3";
         
    }
     else
     {
     document.getElementById('dmessagetooltip').style.display='none';
     document.getElementById('bgsmessagetooltip').src="";
     }
}