/**
* 格式化时间函数
* @param {format} 时间显示格式
*/
Date.prototype.format = function (format) {
var date = {
"M+": this.getMonth() + 1,
"d+": this.getDate(),
"h+": this.getHours(),
"m+": this.getMinutes(),
"s+": this.getSeconds(),
"q+": Math.floor((this.getMonth() + 3) / 3),
"S+": this.getMilliseconds()
};
if (/(y+)/i.test(format)) {
format = format.replace(RegExp.$1, (this.getFullYear() + ‘‘).substr(4 - RegExp.$1.length));
}
for (var k in date) {
if (new RegExp("(" + k + ")").test(format)) {
format = format.replace(RegExp.$1, RegExp.$1.length == 1 ? date[k] : ("00" + date[k]).substr(("" + date[k]).length));
}
}
return format;
};
String.prototype.format = function (args) {
if (arguments.length > 0) {
var result = this;
if (arguments.length == 1 && typeof (args) == "object") {
for (var key in args) {
var reg = new RegExp("({" + key + "})", "g");
result = result.replace(reg, args[key]);
}
}
else {
for (var i = 0; i < arguments.length; i++) {
if (arguments[i] == undefined) {
result = result.replace(reg, arguments[i]);
}
else {
var reg = new RegExp("({[" + i + "]})", "g");
result = result.replace(reg, arguments[i]);
}
}
}
return result;
}
else {
return this;
}
}
String.prototype.trim = function () {
return this.replace(/(^\s*)|(\s*$)/g, ‘‘)
};
function StringBuilder() {
this.__values = new Array();
};
StringBuilder.prototype.appendLine = function (v) {
this.__values.push(v);
}
StringBuilder.prototype.toString = function () {
return this.__values.join(‘‘);
}
Number.prototype.toFixed = function (d) {
var s = this + "";
if (!d) d = 0;
if (s.indexOf(".") == -1) s += ".";
s += new Array(d + 1).join("0");
if (new RegExp("^(-|\\+)?(\\d+(\\.\\d{0," + (d + 1) + "})?)\\d*$").test(s)) {
var s = "0" + RegExp.$2, pm = RegExp.$1, a = RegExp.$3.length, b = true;
if (a == d + 2) {
a = s.match(/\d/g);
if (parseInt(a[a.length - 1]) > 4) {
for (var i = a.length - 2; i >= 0; i--) {
a[i] = parseInt(a[i]) + 1;
if (a[i] == 10) {
a[i] = 0;
b = i != 1;
}
else break;
}
}
s = a.join("").replace(new RegExp("(\\d+)(\\d{" + d + "})\\d$"), "$1.$2");
}
if (b) s = s.substr(1);
return (pm + s).replace(/\.$/, "");
}
return this + "";
}
//限制只能键入数字,flage:是否验证‘.’传入则不可以输入‘.’
function entNumber(e, flage) {
e = e || window.event;
var keyCode = e.keyCode || e.which;
if (!(keyCode == 46) && !(keyCode == 8) && !(keyCode == 37) && !(keyCode == 39) && !(keyCode == 17) && !(keyCode == 13) && ctrlKey()) {
if (!((keyCode >= 48 && keyCode <= 57) || (keyCode == 110 || keyCode == 190) || keyCode == 9 || (keyCode >= 96 && keyCode <= 105))) stopDefault(e);
if (flage) if (!((keyCode >= 48 && keyCode <= 57) || keyCode == 9 || (keyCode >= 96 && keyCode <= 105))) stopDefault(e);
}
//ctrl+c/v/a/x/z
function ctrlKey() {
return !(e.ctrlKey && keyCode == 67) && !(e.ctrlKey && keyCode == 86) && !(e.ctrlKey && keyCode == 65) && !(e.ctrlKey && keyCode == 88) && !(e.ctrlKey && keyCode == 90)
}
}
function getKeyCode(e) {
e = e || window.event;
return e.keyCode || e.which;
}
//阻止浏览器的默认行为
function stopDefault(e) {
e = e || window.event;
if (e.preventDefault) e.preventDefault(); //其他浏览器
else e.returnValue = false; //IE浏览器
}
/**
* 阻止事件(包括冒泡和默认行为)
* */
function stopEvent(e) {
e = e || window.event;
if (e.preventDefault) { //其他浏览器
e.preventDefault();
e.stopPropagation();
} else { //IE浏览器
e.returnValue = false;
e.cancelBubble = true;
}
};
//过滤HTML标签
String.prototype.removeHtmlTab = function () {
return this.replace(/<[^<>]+?>/g, ‘‘);
}
//HTML标签字符转换成转意符
String.prototype.html2Escape = function () {
return this.replace(/[<>&"]/g, function (c) { return { ‘<‘: ‘<‘, ‘>‘: ‘>‘, ‘&‘: ‘&‘, ‘"‘: ‘"‘}[c]; });
}
//转意符换成HTML标签
String.prototype.escape2Html = function () {
var arrEntities = { ‘lt‘: ‘<‘, ‘gt‘: ‘>‘, ‘nbsp‘: ‘ ‘, ‘amp‘: ‘&‘, ‘quot‘: ‘"‘ };
return this.replace(/&(lt|gt|nbsp|amp|quot);/ig, function (all, t) { return arrEntities[t]; });
}
// 转成空格
String.prototype.nbsp2Space = function () {
var arrEntities = { ‘nbsp‘: ‘ ‘ };
return this.replace(/&(nbsp);/ig, function (all, t) { return arrEntities[t] })
}
//回车转为br标签
String.prototype.return2Br = function () {
return this.replace(/\r?\n/g, "<br />");
}
/**
* 移除数组中的空元素
* @param {array} 数组
* @returns {narray} 新数组
* */
Array.prototype.trimArray = function () {
var array = this;
var narray = [];
for (var i = 0; i < array.length; i++)
if (array[i]) {
if (typeof array[i] == "string") {
if (array[i].trim())
narray.push(array[i]);
} else {
narray.push(array[i]);
}
}
return narray;
};
/**
* 移除数组中的指定元素
* @param {elm} 指定元素值
* @returns {narray} 新数组
* */
Array.prototype.remove = function (elm) {
for (var i = 0; i < this.length; i++) {
if (this[i] == elm)
this[i] == ‘‘;
break;
}
return this.trimArray(); //清除空元素
};
/**
* 去除数组中重复的元素
* @param {isStrict} 是否严格模式
* [‘1‘,1] isStric=true 返回1，否则，返回1,1
* @returns {Array}
* */
Array.prototype.unique = function (isStrict) {
if (!this.length) return [];
if (this.length < 2) return [this[0]] || [];
var tempObj = {},
newArr = [];
for (var i = 0; i < this.length; i++) {
var v = this[i];
var condition = isStrict ? (typeof tempObj[v] != typeof v) : false;
if ((typeof tempObj[v] == "undefined") || condition) {
tempObj[v] = v;
newArr.push(v);
}
}
return newArr;
};
/**
* 统计元素在数组中出现的次数
* @param {array} 数组
* [‘1‘,1] isStric=true 返回1，否则，返回1,1
* @returns {Array} 返回一个二维数组::["元素名","出现的次数"]
* */
Array.prototype.sameCount = function () {
var res = [];
var ary = this;
ary.sort();
for (var i = 0; i < ary.length; ) {
var count = 0;
for (var j = i; j < ary.length; j++) {
if (ary[i] == ary[j]) {
count++;
}
}
res.push([ary[i], count]);
i += count;
}
return res;
}
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原文：http://vb2005xu.iteye.com/blog/2305462