/**
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*
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* Base64 encode / decode
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*
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* @author haitao.tu
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* @date 2010-04-26
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* @email tuhaitao@foxmail.com
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*
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*/
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function Base64() {
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// private property
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_keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
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// public method for encoding
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this.encode = function (input) {
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var output = "";
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var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
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var i = 0;
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input = _utf8_encode(input);
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while (i < input.length) {
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chr1 = input.charCodeAt(i++);
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chr2 = input.charCodeAt(i++);
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chr3 = input.charCodeAt(i++);
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enc1 = chr1 >> 2;
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enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
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enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
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enc4 = chr3 & 63;
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if (isNaN(chr2)) {
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enc3 = enc4 = 64;
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} else if (isNaN(chr3)) {
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enc4 = 64;
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}
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output = output +
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_keyStr.charAt(enc1) + _keyStr.charAt(enc2) +
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_keyStr.charAt(enc3) + _keyStr.charAt(enc4);
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}
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return output;
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}
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// public method for decoding
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this.decode = function (input) {
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var output = "";
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var chr1, chr2, chr3;
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var enc1, enc2, enc3, enc4;
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var i = 0;
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input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
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while (i < input.length) {
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enc1 = _keyStr.indexOf(input.charAt(i++));
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enc2 = _keyStr.indexOf(input.charAt(i++));
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enc3 = _keyStr.indexOf(input.charAt(i++));
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enc4 = _keyStr.indexOf(input.charAt(i++));
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chr1 = (enc1 << 2) | (enc2 >> 4);
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chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
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chr3 = ((enc3 & 3) << 6) | enc4;
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output = output + String.fromCharCode(chr1);
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if (enc3 != 64) {
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output = output + String.fromCharCode(chr2);
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}
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if (enc4 != 64) {
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output = output + String.fromCharCode(chr3);
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}
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}
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output = _utf8_decode(output);
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return output;
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}
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// private method for UTF-8 encoding
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_utf8_encode = function (string) {
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string = string.replace(/\r\n/g,"\n");
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var utftext = "";
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for (var n = 0; n < string.length; n++) {
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var c = string.charCodeAt(n);
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if (c < 128) {
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utftext += String.fromCharCode(c);
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} else if((c > 127) && (c < 2048)) {
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utftext += String.fromCharCode((c >> 6) | 192);
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utftext += String.fromCharCode((c & 63) | 128);
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} else {
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utftext += String.fromCharCode((c >> 12) | 224);
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utftext += String.fromCharCode(((c >> 6) & 63) | 128);
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utftext += String.fromCharCode((c & 63) | 128);
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}
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}
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return utftext;
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}
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// private method for UTF-8 decoding
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_utf8_decode = function (utftext) {
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var string = "";
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var i = 0;
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var c = c1 = c2 = 0;
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while ( i < utftext.length ) {
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c = utftext.charCodeAt(i);
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if (c < 128) {
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string += String.fromCharCode(c);
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i++;
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} else if((c > 191) && (c < 224)) {
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c2 = utftext.charCodeAt(i+1);
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string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
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i += 2;
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} else {
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c2 = utftext.charCodeAt(i+1);
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c3 = utftext.charCodeAt(i+2);
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string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
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i += 3;
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}
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}
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return string;
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}
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}
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Date.prototype.Format = function (fmt) {
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var o = {
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"M+": this.getMonth() + 1, //月份
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"d+": this.getDate(), //日
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"H+": this.getHours(), //小时
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"m+": this.getMinutes(), //分
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"s+": this.getSeconds(), //秒
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"q+": Math.floor((this.getMonth() + 3) / 3), //季度
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"S": this.getMilliseconds() //毫秒
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};
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if (/(y+)/.test(fmt)) fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
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for (var k in o)
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if (new RegExp("(" + k + ")").test(fmt)) fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));
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return fmt;
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}
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function getWeek() {
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//按周日为一周的最后一天计算
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var date = new Date();
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//今天是这周的第几天
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var today = date.getDay();
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//上周日距离今天的天数（负数表示）
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var stepSunDay = -today + 1;
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// 如果今天是周日
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if (today == 0) {
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stepSunDay = -7;
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}
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// 周一距离今天的天数（负数表示）
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var stepMonday = 7 - today;
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var time = date.getTime();
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var monday = new Date(time + stepSunDay * 24 * 3600 * 1000);
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var sunday = new Date(time + stepMonday * 24 * 3600 * 1000);
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//本周一的日期 （起始日期）
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var startDate = transferDate(monday); // 日期变换
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//本周日的日期 （结束日期）
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var endDate = transferDate(sunday); // 日期变换
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return startDate + '=' + endDate;
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}
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function transferDate(date) {
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// 年
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var year = date.getFullYear();
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// 月
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var month = date.getMonth() + 1;
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// 日
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var day = date.getDate();
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if (month >= 1 && month <= 9) {
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month = "0" + month;
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}
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if (day >= 0 && day <= 9) {
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day = "0" + day;
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}
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var dateString = year + '-' + month + '-' + day;
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return dateString;
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}
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// 获取前后几天的时间
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function getDay(day){
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var today = new Date();
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var targetday_milliseconds=today.getTime() + 1000*60*60*24*day;
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today.setTime(targetday_milliseconds); //注意，这行是关键代码
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var tYear = today.getFullYear();
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var tMonth = today.getMonth();
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var tDate = today.getDate();
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tMonth = doHandleMonth(tMonth + 1);
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tDate = doHandleMonth(tDate);
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return tYear+"-"+tMonth+"-"+tDate;
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}
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function doHandleMonth(month){
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var m = month;
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if(month.toString().length == 1){
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m = "0" + month;
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}
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return m;
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}
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