var StatM = function (){
	this.keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" + //all caps
				  "abcdefghijklmnopqrstuvwxyz" + //all lowercase
				  "0123456789+/="; // all numbers plus +/=

}
//Base64
//Heres the encode function
StatM.prototype.encode64 = function(inp){
        var out = ""; //This is the output
        var chr1, chr2, chr3 = ""; //These are the 3 bytes to be encoded
        var enc1, enc2, enc3, enc4 = ""; //These are the 4 encoded bytes
        var i = 0; //Position counter

        do { //Set up the loop here
        chr1 = inp.charCodeAt(i++); //Grab the first byte
        chr2 = inp.charCodeAt(i++); //Grab the second byte
        chr3 = inp.charCodeAt(i++); //Grab the third byte

        //Here is the actual base64 encode part.
        //There really is only one way to do it.
        enc1 = chr1 >> 2;
        enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
        enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
        enc4 = chr3 & 63;

        if (isNaN(chr2)) {
                enc3 = enc4 = 64;
        } else if (isNaN(chr3)) {
                enc4 = 64;
        }

        //Lets spit out the 4 encoded bytes
        out = out + this.keyStr.charAt(enc1) + this.keyStr.charAt(enc2) + this.keyStr.charAt(enc3) +
        this.keyStr.charAt(enc4);

        // OK, now clean out the variables used.
        chr1 = chr2 = chr3 = "";
        enc1 = enc2 = enc3 = enc4 = "";

        } while (i < inp.length); //And finish off the loop

        //Now return the encoded values.
        return out;
}
 
StatM.prototype.getCookie = function(name){
        var cname = name + "=";
        var dc = document.cookie;

        if (dc.length > 0) {
                begin = dc.indexOf(cname);

                if (begin != -1) {
                        begin += cname.length;
                        end = dc.indexOf(";", begin);

                        if (end == -1) {end = dc.length;}
                        return unescape(dc.substring(begin, end));
                }
        }
        return "";
}

StatM.prototype.setCookie = function(name, value){
        var argv = this.setCookie.arguments;
        var argc = this.setCookie.arguments.length;

        var path = (3 < argc) ? argv[3] : null;
        var domain = (4 < argc) ? argv[4] : null;
        var secure = (5 < argc) ? argv[5] : false;
        var expires =(2 < argc) ? argv[2] : null;
        var newcookie = name + "=" + value +
        ((expires == null) ? "" : ("; expires="+expires.toGMTString())) +
        ((path == null) ? "" : ("; path=" + path)) +
        ((domain == null) ? "" : ("; domain=" + domain)) +
        ((secure == true) ? "; secure" : "");
        document.cookie = newcookie;
}
StatM.prototype.initPage = function(){
	if(this.getCookie("DJ_UVID") == null || this.getCookie("DJ_UVID") == ""){
        var cookieval = new Date();
        cookieval = cookieval.getTime();
        var rStr_1 = "" + Math.random();
        var rStr_2 = "" + Math.random();
        var rStr_3 = "" + Math.random();
        var rStr_4 = "" + Math.random();
        var rStr_5 = "" + Math.random();
        rStr_1 = rStr_1.charAt(2);
        rStr_2 = rStr_2.charAt(2);
        rStr_3 = rStr_3.charAt(2);
        rStr_4 = rStr_4.charAt(2);
        rStr_5 = rStr_5.charAt(2);

        var uv_expired_data = new Date(2011,1,1);
        cookieval = cookieval + rStr_1 + rStr_2 + rStr_3 + rStr_4 + rStr_5;
        this.setCookie("DJ_UVID", this.encode64(cookieval) , uv_expired_data, "/", "dajie.com", false);
	}
}
var statM = new StatM();
statM.initPage();

function _uVoid() { return; }

function pageStatistics(event_code){
		var para = ""; 
		var url  = "";
		try{
			var argv = pageStatistics.arguments;
        	var argc = pageStatistics.arguments.length;
        	para = (1 < argc) ? argv[1] : "";
        }catch(e){
        }
        if('0000' == event_code){//pv统计专门做一个文件进行
			url = "http://st.dajie.com/p.st";
		}else{
			url = "http://st.dajie.com/s.st";
		}
		var i=new Image(1,1);
        i.src= url + "?e_cd=["+event_code+"]"+para+"&"+(+new Date());
  		i.onload=function() {_uVoid();}
}
//每个页面都记录，暂时部分event_code，如果需要为单独页面做event_code只需要在页头定义一个 event_code 变量即可。
if(typeof(event_code) == 'string'){
	pageStatistics(event_code);
}else{
	pageStatistics('0000');
}