//trim

try
{
    document.execCommand("BackgroundImageCache",false,true); //有点浏览器不支持这句
}
catch(exception)
{
}

String.prototype.trim = function()
{
	return  this.replace(/(^\s*)|(\s*$)/g,"");		
}

//encodeURIComponent
String.prototype.encodeURI = function(){  
  return encodeURIComponent(this);
}

//检查是不是空白字符串，如果等于null或equals("")都返回true
function isEmptyStr(text)
{
	if(text==null)
	{
		return true;
	}
	else if(text=="")
	{
		return true;
	}
	else
	{
		return false;
	}
}

//utility function called by getCookie() 
function getCookieVal(offset) 
{ 
    var endstr = document.cookie.indexOf(";", offset); 
    if(endstr == -1) 
    { 
        endstr = document.cookie.length; 
    } 
    return unescape(document.cookie.substring(offset, endstr)); 
} 



// primary function to retrieve cookie by name 
function getCookie(name) 
{ 
    var arg = name + "="; 
    var alen = arg.length; 
    var clen = document.cookie.length; 
    var i = 0; 
    while(i < clen) 
    { 
        var j = i + alen; 
        if (document.cookie.substring(i, j) == arg) 
        { 
            return getCookieVal(j); 
        } 
        i = document.cookie.indexOf(" ", i) + 1; 
        if(i == 0) break; 
    }
    return;
} 

//取得XMLHttpRequest对象
function getHttpRequest()
{
	var the_http_request = false;  //XMLHttpRequest对象

	try 
	{  
    	the_http_request = new XMLHttpRequest();
	} 
	catch (trymicrosoft) 
	{
		try 
		{
			the_http_request = new ActiveXObject("Msxml2.XMLHTTP");  
		} 
		catch (othermicrosoft) 
		{    
			try 
			{      
				the_http_request = new ActiveXObject("Microsoft.XMLHTTP");    
			} 
			catch (failed) 
			{
				the_http_request = false;    
			}  
		}
	}
	
	return the_http_request;
}

//取得当前域名部分包括http://
function getDomain()
{
    var url=document.location.href;	
	var a1=url.indexOf(".");	
	var b1=url.indexOf("/",a1);
	return url.substring(0,b1);
}


var http_request;  //XMLHttpRequest对象

//邀请查询
function inviteQuery()
{
	if(http_request==null)
	{
	    http_request=getHttpRequest();
	}
	
	if (!http_request)  
	{
	    alert("XMLHttpRequest 初始化失败!");
	}
	else
	{
	    
	    if(getCookie("visitorID")==null)
		{
		    return;
		}
	
	    var url=getDomain() + "/visitor/record/inviteQuery.asp?visitorID=" + getCookie("visitorID");
		//document.write(url);
		http_request.open("GET", url, true); //打开请求
		http_request.onreadystatechange = inviteQuery_updatePage; //设置回调方法
		//http_request.setRequestHeader("Content-length", url.length);
        //http_request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
		http_request.send(null); //发送请求
	}
	
	return false;
}

//回调方法
function inviteQuery_updatePage()
{
    if (http_request.readyState == 4)
    {		
	    if(http_request.status == 200)
	    {		
		    if(!isEmptyStr(http_request.getResponseHeader("msg")))
			{			
				if(http_request.getResponseHeader("msg")=="1") //当有邀请时
				{				
				    var bodyWidth=document.body.clientWidth;
				    var bodyHeight=document.body.clientHeight; 
					
				    document.getElementById("id_invite").style.left=bodyWidth/2-439/2;
				    document.getElementById("id_invite").style.top=bodyHeight/2-159/2;
				
				    document.getElementById("id_invite").style.display="";
					document.getElementById("id_invite").innerHTML= http_request.responseText;
					
				    //decodeURI
				}
			}			
		}
		else
		{
		    if(!isEmptyStr(http_request.responseText))
			{
			    alert("错误：\n" + http_request.responseText);
			}		    
		}
	}	
}

//不接受请求
function hideInvite()
{
    document.getElementById("id_invite").style.display="none";
	
	if(timerID!=null)
	{
	    clearInterval(timerID);
	}
}


function drag(o,s)  
{  
    if (typeof o == "string") o = document.getElementById(o);  
    o.orig_x = parseInt(o.style.left) - document.body.scrollLeft;  
    o.orig_y = parseInt(o.style.top) - document.body.scrollTop;  
    o.orig_index = o.style.zIndex;  
          
    o.onmousedown = function(a)  
    {  
        this.style.cursor = "move";  
        this.style.zIndex = 10000;  
        var d=document;  
        if(!a)a=window.event;  
        var x = a.clientX+d.body.scrollLeft-o.offsetLeft;  
        var y = a.clientY+d.body.scrollTop-o.offsetTop;
       
        d.ondragstart = "return false;"
        d.onselectstart = "return false;"
        d.onselect = "document.selection.empty();"
                  
        if(o.setCapture)
            o.setCapture();
        else if(window.captureEvents)
            window.captureEvents(Event.MOUSEMOVE|Event.MOUSEUP);

        d.onmousemove = function(a)  
        {  
            if(!a)a=window.event;  
            o.style.left = a.clientX+document.body.scrollLeft-x;  
            o.style.top = a.clientY+document.body.scrollTop-y;  
            o.orig_x = parseInt(o.style.left) - document.body.scrollLeft;  
            o.orig_y = parseInt(o.style.top) - document.body.scrollTop;  
        }  

        d.onmouseup = function()  
        {  
            if(o.releaseCapture)  
                o.releaseCapture();  
            else if(window.captureEvents)  
                window.captureEvents(Event.MOUSEMOVE|Event.MOUSEUP);  
            d.onmousemove = null;  
            d.onmouseup = null;  
            d.ondragstart = null;  
            d.onselectstart = null;  
            d.onselect = null;  
            o.style.cursor = "normal";  
            o.style.zIndex = o.orig_index;  
        }  
    }  
      
    if (s)  
    {  
        var orig_scroll = window.onscroll?window.onscroll:function (){};  
        window.onscroll = function()  
        {  
            orig_scroll();  
            o.style.left = o.orig_x + document.body.scrollLeft;  
            o.style.top = o.orig_y + document.body.scrollTop;  
        }
    }
}

var timerID;

var isProduct="";
if(document.location.href.toLowerCase().indexOf("detail_product.asp")>0 || document.location.href.toLowerCase().indexOf("detail_product_e.asp")>0)
{
    isProduct="&isProduct=1";
}

document.write('<img src=/visitor/record/record.asp?user=' + escape("zyam") + '&referer=' + escape(document.referrer) + '&url=' + escape(document.location.href) + isProduct + ' height=0 width=0></img>');

document.write('<div id="id_invite" style="position:absolute;left:203px;top:114px;width:439px;height:158px;z-index:1;background-image: url(/visitor/images/bg_invite.gif);display:none;"></div>');

drag("id_invite");

timerID=setInterval("inviteQuery()",5000); //定时器