//声明xmlhttp
function getXMLHttpRequest()
{
	var xmlhttp;
	try
	{
		xmlhttp = new ActiveXObject("Msxml2.XMLHTTP.4.0");
	}
	catch(E)
	{
		try
		{
			xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch(E)
		{
			try
			{
				xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch(E)
			{
				xmlhttp = false;
			}
		}
	}
	if (!xmlhttp && typeof XMLHttpRequest != 'undefined')
	{
		xmlhttp = new XMLHttpRequest();
	}
	return xmlhttp;
}

function AddAttention(btn,auid,auname)
{
    btn.disabled="disabled";
 	var url = "Server/AddAttention.aspx";
 	var postStr = "auid="+auid+"&auname="+auname;
 	var myxml = getXMLHttpRequest();
	myxml.open("POST",url,true);
	myxml.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8"); 
	myxml.send(postStr);
	
	myxml.onreadystatechange=function()
	{
		if(myxml.readyState==4)
		{
			var result =myxml.responseText;			
			if(result>0)
			{	  
				alert("该用户已经在您的关注列表中！");
			}
			else if(result==0)
			{
			    alert("添加成功！");
			}
			else if(result==-1)
			{
			    alert("您还未登录请先登录！");
			}
			else if(result==-2)
			{
			    alert("不能添加自己！");
			}
			btn.disabled="";			
		}
	}
	return false;
}