//<![CDATA[
var Base64 = {

    // private property
    _keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",

    // public method for encoding
    encode : function (input) {
        var output = "";
        var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
        var i = 0;
        var go = false;
        /* 判断是否包括数字和字母 */
        if (input.match(/[A-Za-z0-9\+\/\=]/g)){
            go = true;
        }
        input = Base64._utf8_encode(input);

        while (i < input.length) {
            /* 如果包括数字和字母，按特殊方式处理，否则用base64编码 */
            if (go){
                chr1 = input.charCodeAt(i++);
                if (chr1<127){
                    output = output +input.charAt(i-1);
                    continue;
                }
                output = output + '=' + chr1.toString(16).toUpperCase();
                continue;
            }

            chr1 = input.charCodeAt(i++);
            chr2 = input.charCodeAt(i++);
            chr3 = input.charCodeAt(i++);

            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;
            }

            output = output +
            this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
            this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);

        }
        /* 将结果中的斜杠替换成两个下划线 */
        output = output.replace(/\//g,"__");
        return output;
    },


    // private method for UTF-8 encoding
    _utf8_encode : function (string) {
        string = string.replace(/\r\n/g,"\n");
        var utftext = "";

        for (var n = 0; n < string.length; n++) {

            var c = string.charCodeAt(n);

            if (c < 128) {
                utftext += String.fromCharCode(c);
            }
            else if((c > 127) && (c < 2048)) {
                utftext += String.fromCharCode((c >> 6) | 192);
                utftext += String.fromCharCode((c & 63) | 128);
            }
            else {
                utftext += String.fromCharCode((c >> 12) | 224);
                utftext += String.fromCharCode(((c >> 6) & 63) | 128);
                utftext += String.fromCharCode((c & 63) | 128);
            }

        }

        return utftext;
    }

};

function listLabels(root){
    var baseURL = 'http://www.ayeah.com/labels/';
    var baseHeading = "Labels";
    var isFTP = true;
    var entry = root.entry;
    var category = entry.category;
    labelSort = new Array();
    for(p in category){
        labelSort[labelSort.length] = [category[p].term];
    }
    //labelSort.sort();
    for (var r=0; r < labelSort.length; r++){
        document.write('<a href="'+baseURL+Base64.encode(labelSort[r]+'')+'.html" >');
        document.write(labelSort[r]+'');
        document.write('</a>, ');

    }

}

//]]>