ajax.js里面有内容显示效果，根据ID

ajax.js里面有内容显示效果，根据id

    var http_request = false;
    var success=false;
    var showalllistflag=1;
    var displayarticle=true;
    function makerequest(url,cateid) {

        http_request = false;

        if (window.xmlhttprequest) { // mozilla, safari,...
            http_request = new xmlhttprequest();
            if (http_request.overridemimetype) {
                http_request.overridemimetype('text/xml');
            }
        } else if (window.activexobject) { // ie
            try {
                http_request = new activexobject("msxml2.xmlhttp");
            } catch (e) {
                try {
                    http_request = new activexobject("microsoft.xmlhttp");
                } catch (e) {}
            }
        }

        if (!http_request) {
            alert('giving up :( cannot create an xmlhttp instance');
            return false;
        }
        http_request.onreadystatechange = alertcontents;
        http_request.open('get', url, false);
        http_request.send(null);
        if (success==true)
        {
            try {
                   cateid.innerhtml=http_request.responsetext;
                } catch (e) {}

            success==false;
        }

    }

    function alertcontents() {

        if (http_request.readystate == 4) {
            if (http_request.status == 200) {
                success=true;
            } else {
                alert('there was a problem with the request.');
            }
        }

    }

    function setcatlog(id,order,leftnumber) {

        var cateid=document.getelementbyid('cate'+id);
        setdisplay(cateid);
        if (cateid.style.display=="")
        {
        var url2="include/getsitelistfunction.asp?id="+id+"&order="+order+"&leftnumber="+leftnumber+"&r="+math.random();
        makerequest(url2,cateid);
        }
        else
        {
        var url2="include/getsitelistfunction.asp?id="+id+"&removeid=1&r="+math.random();
        makerequest(url2,cateid);
        }
    }

    function setarticlelist(encodeurl,articleid) {

        if (displayarticle==true)
        {
            try {  var objarticleidtop = document.getelementbyid('top'+articleid);
               var objarticleidbottom = document.getelementbyid('bottom'+articleid);
               if (objarticleidtop)
                  {
                    if  (objarticleidtop.style.display=="none")
                    {

                    objarticleidtop.style.display="";
                    }
                    else
                    {

                    objarticleidtop.style.display="none";
                    }
                  } 
                  if (objarticleidbottom)
                  {
                    if  (objarticleidbottom.style.display=="none")
                    {
                    var url2="include/getarticlefunction.asp?linkstr="+encodeurl+"&r="+math.random();
                    makerequest(url2,objarticleidbottom);
                    objarticleidbottom.style.display="";
                    }
                    else
                    {

                    objarticleidbottom.style.display="none";
                    }
                  } 

             } catch (e) {alert(e.description);}
        }
        else
        {
        }

    }


    function displaycontent(articleid) {

        if (displayarticle==true)
        {
            try {  var objarticleidtop = document.getelementbyid('top'+articleid);
               var objarticleidbottom = document.getelementbyid('bottom'+articleid);
               if (objarticleidtop)
                  {
                    if  (objarticleidtop.style.display=="none")
                    {

                    objarticleidtop.style.display="";
                    }
                    else
                    {

                    objarticleidtop.style.display="none";
                    }
                  } 
                  if (objarticleidbottom)
                  {
                    if  (objarticleidbottom.style.display=="none")
                    {

                    objarticleidbottom.style.display="";
                    }
                    else
                    {

                    objarticleidbottom.style.display="none";
                    }
                  } 

             } catch (e) {alert(e.description);}
        }
        else
        {
        }

    }

    function setdisplay(cateid) {
        if  (cateid.style.display=="none")
        {
        cateid.style.display="";
        cateid.innerhtml="loading..."
        }
        else
        {
        cateid.style.display="none";  
        }
    }

    function setdisplay2(cateid) {

        if (showalllistflag==1)
        {
          cateid.style.display="";
          cateid.innerhtml="loading..."
        }
        else
        {
          cateid.style.display="none";
        }
    }

    function showalllist(order,leftnumber,tagname)    {
        var obj = document.getelementsbytagname(tagname)

        for (a=0;a<obj.length;a++)
        {
            if (obj[a].classname=="sitelist")
            {
                obj2=obj[a].id;
                var id=obj2.replace("cate","");
                var cateid=document.getelementbyid(obj2);
                setdisplay2(cateid);
                if (cateid.style.display=="")
                {
                var url2="include/getsitelistfunction.asp?id="+id+"&order="+order+"&leftnumber="+leftnumber+"&r="+math.random();
                makerequest(url2,cateid);
                }
                else
                {
                var url2="include/getsitelistfunction.asp?id="+id+"&removeid=1&r="+math.random();
                makerequest(url2,cateid);
                }

            }

        }

        if (showalllistflag==1)
        {
            showalllistflag=2;
        }
        else
        {
            showalllistflag=1;
        }

    }

    function expandlistbysession(str,order,leftnumber) {
        try {
                var expandlist=str.split("|");

                for (b=0;b<expandlist.length-1;b++)
                {
                    setcatlog(expandlist[b],order,leftnumber)        
                }
             } catch (e) {}

    }