js一些常用方法

string 增加 IsNullorEmpty ：

String.prototype.IsNullOrEmpty = function (r) {
if (r === undefined || r === null || r === "") {
return true;
} else {
return false;
}
}

Json转String：

function JsonToString(o) {
var arr = [];
var fmt = function (s) {
if (typeof s == 'object' && s != null) return JsonToStr(s);
return /^(string|number)$/.test(typeof s) ? "'" + s + "'" : s;
}
for (var i in o) arr.push("'" + i + "':" + fmt(o[i]));
return '{' + arr.join(',') + '}';
}

获取浏览器版本：

function GetExplorer() {
var OsObject = "";
if (navigator.userAgent.indexOf("MSIE") > 0) {
return "IE";
}
if (isFirefox = navigator.userAgent.indexOf("Firefox") > 0) {
return "Firefox";
}
if (isSafari = navigator.userAgent.indexOf("Safari") > 0) {
return "Safari";
}
if (isCamino = navigator.userAgent.indexOf("Camino") > 0) {
return "Camino";
}
if (isMozilla = navigator.userAgent.indexOf("Gecko/") > 0) {
return "Gecko";
}
}

操作日期的一些方法：

function FormatJsonTime(json) {
if (json != null) {
var date = ConvertJSONDateToJSDateObject(json);
return GetTime(date);
}
else {
return "";
}
}
function FormatJsonDate(json) {
if (json != null) {
var date = ConvertJSONDateToJSDateObject(json);
return GetDateTime(date);
}
else {
return "";
}
}

function FormatJsonDay(json) {
if (json != null) {
var date = ConvertJSONDateToJSDateObject(json);
return GetDate(date);
}
else {
return "";
}
}

/* Json时间转换成JS时间对象 */
function ConvertJSONDateToJSDateObject(jsondate) {
var date = new Date(parseInt(jsondate.replace("/Date(", "").replace(")/", ""), 10));
return date;
}

/* 获取日期 */
function GetDate(date) {
var year = date.getFullYear();
var month = date.getMonth() + 1;
var day = date.getDate();
return year + "-" + month + "-" + day;
}

/* 获取日期 */
function GetDate_(date) {
var year = date.getFullYear();
var month = date.getMonth() + 1;
var day = date.getDate();
return year + "/" + month + "/" + day;
}

/* 获取日期时间 */
function GetDateTime(date) {
var year = date.getFullYear();
var month = date.getMonth() + 1;
var day = date.getDate();
var hh = date.getHours();
var mm = date.getMinutes();
var ss = date.getSeconds();
return year + "-" + month + "-" + day + " " + hh + ":" + mm + ":" + ss;
}
function GetTime(date) {
var hh = date.getHours();
var mm = date.getMinutes();
var ss = date.getSeconds();
return hh + ":" + mm + ":" + ss;
}

js产生UUID

function Str4() {
return (((1 + Math.random()) * 0x10000) | 0).toString(16).substring(1);
}
function UUID() {
return Str4() + Str4() + "-" + Str4() + "-" + Str4() + "-" + Str4() + "-" + Str4() + Str4() + Str4();
}

//获取URL参数
function Request(paras) {
var url = location.href;
var paraString = url.substring(url.indexOf("?") + 1, url.length).split("&");
var paraObj = {}
for (i = 0; j = paraString[i]; i++) {
paraObj[j.substring(0, j.indexOf("=")).toLowerCase()] = j.substring(j.indexOf("=") + 1, j.length);
}
var returnValue = paraObj[paras.toLowerCase()];
if (typeof (returnValue) == "undefined") {
return "";
} else {
return returnValue;
}
}

数组增加IndexOf属性

function CheckIndexOf() {
if (!Array.prototype.indexOf) {
Array.prototype.indexOf = function (elt /*, from*/) {
var len = this.length >>> 0;

var from = Number(arguments[1]) || 0;
from = (from < 0)
? Math.ceil(from)
: Math.floor(from);
if (from < 0)
from += len;

for (; from < len; from++) {
if (from in this &&
this[from] === elt)
return from;
}
return -1;
};
}
}

window。Open

screenH = window.screen.availHeight;
screenW = window.screen.availWidth
function openWin(winUrl, cWidth, cHeight) {
var height = cHeight == null ? 400 : cHeight;
var width = cWidth == null ? 400 : cWidth;
var pos_left = (screenW - width) / 2;
var pos_top = (screenH - height) / 2;
var winid = Str4();
window.open(winUrl, winid, 'height=' + height + ', width=' + width + ', top=' + pos_top + ', left=' + pos_left + ', toolbar=no, menubar=no, scrollbars=yes, resizable=yes,location=no, status=no');
}