//ȫ�ֱ���
//�����ȡ�����XML��������ļ�ʱ�Ƿ���ִ���
var isError = false;
var xmlPath = "/AdPreview/";
var arrAd = new Array();
var arrIndex = 0;

//�������XML�����ļ�
function parseXMLFile(sUrl ,nAdType, nStyle, sName)
{
    var sRet = "";
    var xmlDoc = new ActiveXObject("Msxml2.DOMDocument");
    var root;
    xmlDoc.async = false;
    try
    {
        xmlDoc.load(sUrl);
        root = xmlDoc.documentElement;
        if(root.childNodes.item(0).childNodes.item(0).text == "1")
        {
            isError = true;
            return sRet;
        }

        var eltAdRoot = root.selectSingleNode("adList");//selectNodes
        var eltAdList  = eltAdRoot.selectNodes("ad");
        var nLen = eltAdList.length;
        if(nAdType == 3 || nStyle == 1 || nStyle == 4 || nStyle == 5)
        {
            var nIndex = Math.floor(Math.random()*nLen)
            linkUrl = eltAdList.item(nIndex).selectSingleNode("linkurl").text;
            entityUrl = eltAdList.item(nIndex).selectSingleNode("entityurl").text;
            sRet = getDisplayContent(linkUrl, entityUrl, sName);
        }
        else
        {
            if(nStyle == 2 || nStyle == 6)
            {
                for(i=0; i<nLen; i++)
                {
                    linkUrl = eltAdList.item(i).selectSingleNode("linkurl").text;
                    entityUrl = eltAdList.item(i).selectSingleNode("entityurl").text;
                    if(nStyle == 6 && i > 0)
                    	sRet += "<br/>";
                    sRet += getDisplayContent(linkUrl, entityUrl, sName);
                    
                }

            }
        }
        return sRet;
    }
    catch(ex)
    {
        isError = true;
        return sRet;
    }
}


//��ȡ���ʵ�������
function getEntityType(entityUrl)
{
    var pos = entityUrl.lastIndexOf(".");
    var entityType = entityUrl.substring(pos + 1);
    return entityType;
}

function isFlash(entityType)
{
    if(entityType == "swf")
        return true;
    return false;
}

//��ȡ����Ҫ��ʾ�Ĺ��ʵ���HTMLԴ����
function getDisplayContent(linkUrl, entityUrl, sName)
{
    var result = "";
    if(isFlash(getEntityType(entityUrl)))
    {
        result += "<OBJECT id=\"img" + sName + "\" classid=\"clsid:D27CDB6E-AE6D-11cf-96B8-444553540000\"";
        if(sName == "divcontent")
        {
        	result += " Height=\"300\" ";
        	result += " width=\"360\" ";
        }
        result += " codebase=\"http://active.macromedia.com/flash2/cabs/swflash.cab#version=5,0,0,0\">";
        result += "<PARAM NAME=movie VALUE=\"" + entityUrl + "\">";
        result += "<PARAM NAME=quality VALUE=high>";
        result += "<EMBED src=\"" + entityUrl + "\" quality=high TYPE=\"application/x-shockwave-flash\" PLUGINSPAGE=\"http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash\"></EMBED>";
        result += "</OBJECT>";
    }
    else
    {
    	if(linkUrl == null || linkUrl.length == 0 || linkUrl == "null")
	        result += "<img id=\"img" + sName + "\" src=\"" + entityUrl + "\" border=0>";
	else
	{
	        result += "<a href=\"" + linkUrl + "\">";
	        result += "<img id=\"img" + sName + "\" src=\"" + entityUrl + "\" border=0>";
	        result += "</a>";
	}
    }
    return result;
}


//���������
function doContentAd(sUrl)
{
    try
    {
        document.all("adv_div_edit").style.display = "none";
    }
    catch(ex)
    {}

    if(document.all("adv_div_default") == null)
        return;

    if(document.all("adv_div_none") != null)
        return;

    var objAd;
    var bHasEdit;
    if(document.all("adv_div_edit") != null)
    {
        objAd = document.all("adv_div_edit");
        bHasEdit = true;
    }
    else
    {
        objAd = document.all("adv_div_default");
        bHasEdit = false;
    }

    var sName = "divcontent";
    var sAdValue = parseXMLFile(sUrl,3,0,sName);

    if(isError)
        return;

    if(bHasEdit)
    {
        var vAlign = objAd.align;
        objAd.outerHTML = sAdValue
        objAd.style.display = "inline";
        objAd.align = vAlign;
    }
    else
    {
        objAd.innerHTML = sAdValue;
        objAd.style.display = "inline";
    }
}

/*
nStyle
1��ҳ��ˢ���Զ�����
2���򵥺���
3����һ��ʱ�����
4��ҳ����Ʈ��
5�����ڵײ�
6: ������
*/
function showAd(nAdType, nAdPosition, nStyle)
{
    //����������
    if(nAdType == 3)
    {
        nAdPosition = 0;
    }

    //��������ļ�
    var sUrl = xmlPath + "ad_" + ad_siteid + "_" + ad_nodeid + "_" + nAdType + "_" + nAdPosition + ".xml";
    //alert(sUrl);

    if(nAdType == 3)
    {
        //���������
        doContentAd(sUrl);
    }
    else
    {
        //��һ��ʱ�����
        if(nStyle == 3)
        {
            arrAd[arrIndex] = new Array();
            arrAd[arrIndex][0] = nAdType;
            arrAd[arrIndex][1] = nAdPosition;
            arrAd[arrIndex][2] = 1;

            arrIndex++;
            if(arrIndex == 1)
            {
                window.setInterval('reloadAd()',5000);
            }

            nStyle = 1;
        }

        var sName = "div_ad_" + nAdType + "_" + nAdPosition;
        var sRet = parseXMLFile(sUrl, nAdType, nStyle, sName);
        if(isError)
            return;
        
        //alert(sRet);

        if(nStyle == 5 || nStyle == 4)
        {
            adMove(sRet, sName, nStyle);
        }
	else
	{
            var obj = document.all(sName);
            obj.innerHTML = sRet;
        }

    }
}

function reloadAd()
{
    for(i=0; i<arrIndex; i++)
    {
        showAd(arrAd[i][0], arrAd[i][1], arrAd[i][2]);
    }
}

var imgheight = 200;


function adMoveRefresh(sName, nStyle)
{
    if(nStyle == 5)
    {
        document.all(sName).style.top = document.body.scrollTop + document.body.offsetHeight - imgheight;
        document.all(sName).style.right = 5;
    }
    else if(nStyle == 4)
    {
        var nTop = document.all(sName).style.top;
        var nLeft = document.all(sName).style.left;
        nTop = nTop.replace("px","");
        nLeft = nLeft.replace("px","");
        nTop = nTop - 0 + 10;
        nLeft = nLeft - 0 + 10;
        if(nTop > document.body.clientHeight)
        {
            nTop = nTop - document.body.clientHeight;
        }

        if(nLeft > document.body.clientWidth)
        {
            nLeft = nLeft - document.body.clientWidth;
        }

        document.all(sName).style.top = nTop;
        document.all(sName).style.left = nLeft;
    }

    setTimeout("adMoveRefresh(\"" + sName +"\"," + nStyle + ");",500);
}

function adMove(sRet, sName, nStyle)
{
    var obj = document.all(sName);
    sRet = "<div id=\"" + sName + "\" style='position: absolute;visibility: visible;z-index: 1'>" + sRet + "</div>";
    obj.outerHTML = sRet;
    obj = document.all(sName);
    imgheight = document.all("img" + sName).height;
    adMoveRefresh(sName, nStyle);
}