dotopAlert 提示用户需安装播放器的代码

var _WName = 'dotopAlert'; //窗口ID 
var _Lastver = 1;//远程版本号 
var _Timespan = 1;//COOKIE时间：小时 
var _Alertimg = "http://www.**.com/js/ads/alert.png";//图片地址 
var _WUrl = 'http://**.com/**.exe';//下载地址 
function $(id){ 
    return "string" == typeof id ? document.getElementById(id) : id; 
}; 
var dCookie={} 
dCookie.set =function(name, value, expiresd, path, domain, secure) 
{ 
    var expdate = new  Date(); 
    var expires = arguments[2] || null; 
    var  path  =  arguments[3] || "/"; 
    var  domain  =  arguments[4] || null; 
    var  secure  =  arguments[5] || false; 
    if(expires) expdate.setMinutes(expdate.getMinutes() + parseInt(expires)); 
    var cookietemp = escape(name) + '=' + escape(value) + (expires ? '; expires=' + expdate.toGMTString() : '') + (path ? '; path=' + path : '')+ (domain ? '; domain=' + domain : '')+(secure ? '; secure' : ''); 
    document.cookie = cookietemp; 
} 
dCookie.get=function(name) 
{ 
    var arr,reg=new RegExp("(^| )"+name+"=([^;]*)(;|$)"); 
    if(arr=document.cookie.match(reg)) 
    { 
        return unescape(arr[2]); 
    } 
    else
    { 
        return null; 
    } 
} 
function __showNotice() 
{ 
    var dWidth,dHeight,dLeft,dTop 
    dWidth=$(_WName).scrollWidth 
    dHeight=$(_WName).scrollHeight 
    dLeft=Math.floor((window.document.documentElement.clientWidth-dWidth-414)/2)+(window.document.documentElement.scrollLeft||window.document.body.scrollLeft) 
    dTop=Math.floor((window.document.documentElement.clientHeight-dHeight-178)/2)+(window.document.documentElement.scrollTop||window.document.body.scrollTop) 
    $(_WName).style.display = ''; 
    $(_WName).style.left=dLeft+"px"
    $(_WName).style.top=dTop-40+"px"
} 
function dotopClose() 
{ 
    $(_WName).style.display = 'none'; 
} 
function dotopOK() 
{ 
    dCookie.set('dNotices',1,60*_Timespan ,'/'); 
    $(_WName).style.display = 'none'; 
} 
function dotopNO() 
{ 
    $(_WName).style.display = 'none'; 
} 
function getChaosuV() 
{ 
    var version="0.0"; 
    try
    {  
         var c = new ActiveXObject("WebProxy.CChaosuInfo"); 
         version = c.GetVersion(0); 
    } catch (e) { 
        try
        {  
            var c = new ActiveXObject("chaosuProxy.CChaosuInfo"); 
          version = c.GetVersion(0); 
        }catch (e) { 
        } 
    }    
    version=""+version 
    var index=version.indexOf('.'); 
    if(index==-1)version="2."+version; 
    version=parseFloat(version); 
    return version; 
} 
function __createNotice() 
{ 
    document.write("<div id='"+ _WName +"' style='display:none;position:absolute;z-index:999;width:414px;height:178px;background:url("+ _Alertimg +") no-repeat'><i style='display:block;width:21px;height:21px;position:absolute;right:5px;top:5px;cursor:pointer' onclick='dotopClose()'></i><a style='display:block;position:absolute;cursor:pointer;width:73px;height:19px;top:120px;left:134px' onclick='dotopOK()' target='_blank' href='"+_WUrl+"'></a><i style='display:block;width:73px;height:19px;position:absolute;cursor:pointer;top:120px;left:215px;'onclick='dotopNO()'></i></div>"); 
    __showNotice(); 
} 
var iNum = parseInt(dCookie.get("dNoticeNum")); 
iNum = (isNaN(iNum)) ? 0 : iNum; 
var iAllow = parseInt(dCookie.get("dNotices")); 
iAllow = (isNaN(iAllow)) ? 0 : iAllow; 
if (iAllow==0 && getChaosuV()<_Lastver ){ 
    if (iNum>2) 
    { 
        dCookie.set('dNoticeNum',0,60*_Timespan ,'/'); 
        dCookie.set('dNotices',1,60*_Timespan ,'/') 
    }else{ 
        iNum++; 
        dCookie.set('dNoticeNum',iNum,60*_Timespan ,'/'); 
        __createNotice() 
    } 
}