// 对Date的扩展，将 Date 转化为指定格式的String 
// 月(M)、日(d)、小时(h)、分(m)、秒(s)、季度(q) 可以用 1-2 个占位符， 
// 年(y)可以用 1-4 个占位符，毫秒(S)只能用 1 个占位符(是 1-3 位的数字) 
// 例子： 
// (new Date()).Format("yyyy-MM-dd hh:mm:ss.S") ==> 2006-07-02 08:09:04.423 
// (new Date()).Format("yyyy-M-d h:m:s.S")      ==> 2006-7-2 8:9:4.18 
Date.prototype.Format = function (fmt) { //author: meizz 
    var o = {
        "M+": this.getMonth() + 1,                 //月份 
        "d+": this.getDate(),                    //日 
        "h+": this.getHours(),                   //小时 
        "m+": this.getMinutes(),                 //分 
        "s+": this.getSeconds(),                 //秒 
        "q+": Math.floor((this.getMonth() + 3) / 3), //季度 
        "S": this.getMilliseconds()             //毫秒 
    };
    if (/(y+)/.test(fmt))
        fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
    for (var k in o)
        if (new RegExp("(" + k + ")").test(fmt))
            fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));
    return fmt;
};

function _COMMON() {
    var common = {
        request: function (d) {
            for (var c = location.search.slice(1).split("&"), a = 0; a < c.length; a++) {
                var b = c[a].split("=");
                if (b[0] === d)
                    if ("undefined" === decodeURIComponent(b[1]))
                        break;
                    else return decodeURIComponent(b[1]);
            }
            return "";
        },
        isMobile: function () {
            var userAgentInfo = navigator.userAgent;
            var Agents = ["Android", "iPhone",
                "SymbianOS", "Windows Phone",
                "iPad", "iPod"];
            var flag = false;
            for (var v = 0; v < Agents.length; v++) {
                if (userAgentInfo.indexOf(Agents[v]) > 0) {
                    flag = true;
                    break;
                }
            }
            return flag;
        },
        ajax: function () {
            var ajaxData = {
                type: arguments[0].type || "GET",
                url: arguments[0].url || "",
                async: arguments[0].async || true,
                data: arguments[0].data || null,
                dataType: arguments[0].dataType || "text",
                contentType: arguments[0].contentType || "application/x-www-form-urlencoded",
                beforeSend: arguments[0].beforeSend || function () { },
                success: arguments[0].success || function () { },
                error: arguments[0].error || function () { }
            };
            ajaxData.beforeSend();
            var xhr = createxmlHttpRequest();
            xhr.responseType = ajaxData.dataType;
            var data = convertData(ajaxData.data);
            if (ajaxData.type.toLowerCase() === 'get') {
                ajaxData.url = ajaxData.url + (ajaxData.url.indexOf('?') > 0 ? '&' : '?') + (data || '');
                data = null;
            }
            xhr.open(ajaxData.type, ajaxData.url, ajaxData.async);
            xhr.setRequestHeader("Content-Type", ajaxData.contentType);
            xhr.send(data);
            xhr.onreadystatechange = function () {
                if (xhr.readyState === 4) {
                    if (xhr.status === 200) {
                        ajaxData.success(xhr.response);
                    } else {
                        ajaxData.error();
                    }
                }
            };
        },
        getFileSize: function (fileByte) {
            var fileSizeByte = fileByte;
            var fileSizeMsg = "";
            if (fileSizeByte < 1048576) fileSizeMsg = (fileSizeByte / 1024).toFixed(2) + "KB";
            else if (fileSizeByte == 1048576) fileSizeMsg = "1MB";
            else if (fileSizeByte > 1048576 && fileSizeByte < 1073741824) fileSizeMsg = (fileSizeByte / (1024 * 1024)).toFixed(2) + "MB";
            else if (fileSizeByte > 1048576 && fileSizeByte == 1073741824) fileSizeMsg = "1GB";
            else if (fileSizeByte > 1073741824 && fileSizeByte < 1099511627776) fileSizeMsg = (fileSizeByte / (1024 * 1024 * 1024)).toFixed(2) + "GB";
            else fileSizeMsg = "文件超过1TB";
            return fileSizeMsg;
        }
    };

    function createxmlHttpRequest() {
        if (window.ActiveXObject) {
            return new ActiveXObject("Microsoft.XMLHTTP");
        } else if (window.XMLHttpRequest) {
            return new XMLHttpRequest();
        }
    }

    function convertData(data) {
        if (typeof data === 'object') {
            var convertResult = "";
            for (var c in data) {
                convertResult += c + "=" + data[c] + "&";
            }
            convertResult = convertResult.substring(0, convertResult.length - 1);
            return convertResult;
        } else {
            return data;
        }
    }
    return common;
}