var ua = navigator.userAgent.toLowerCase(),
BrowserInfo = {
// android
isAndroid: Boolean (ua.match (/android/g)),
// iphone phone
isIphone: Boolean (ua.match (/ iphone | ipod / g)),
// ipad
isIpad: Boolean(ua.match(/ipad/g)),
// WeChat
isWeixin: Boolean(ua.match(/MicroMessenger/g)),
}
Returns the length of the string, the man count is 2
function strLength(str) {
var a = 0;
for (var i = 0; i < str.length; i++) {
if (str.charCodeAt(i) > 255)
a += 2;//Increase the count by 2 as expected
else
a++;
}
return a;
}
Get the parameters in the url
/**
* public method definition
* @example: http://xxx.com/a.do?name=zhangsan
* Output: getParameter('name') // 'zhangsan'
*/
var getParameter = function(param, url) {
var reg = new RegExp('[&,?,&]' + param + '=([^\\&]*)', 'i'),
value = reg.exec(decodeURIComponent(decodeURIComponent(url || location.search || location.hash)));
return value ? value[1] : '';
}
js binding events for element bindings for any browser
function eventBind(obj, eventType, callBack) {
// w3c
if (obj.addEventListener) {
obj.addEventListener(eventType, callBack, false);
// low version ie
}else if (window.attachEvent) {
obj.attachEvent('on' + eventType, callBack);
}else {
obj['on' + eventType] = callBack;
}
};
eventBind(document, 'click', bodyClick);
remove event
this.moveBind = function (objId, eventType, callBack) {
var obj = document.getElementById(objId);
if (obj.removeEventListener) {
obj.removeEventListener(eventType, callBack, false);
}else if (window.detachEvent) {
obj.detachEvent('on' + eventType, callBack);
}else {
obj['on' + eventType] = null;
}
}
Get the Object object of the current click event
function getEvent() {
if (document.all) {
return window.event; //if it is ie
}
func = getEvent.caller;
while (func != null) {
var arg0 = func.arguments [0];
if (arg0) {
if ((arg0.constructor == Event || arg0.constructor == MouseEvent)
|| (typeof (arg0) == "object" && arg0.preventDefault && arg0.stopPropagation)) {
return arg0;
}
}
func = func.caller;
}
return null;
};
String interception method
var getCharactersLen = function (charStr, cutCount) {
if (charStr == null || charStr == '')
return '';
var totalCount = 0;
var newStr = '';
for (var i = 0; i < charStr.length; i++) {
var c = charStr.charCodeAt(i);
if (c < 255 && c > 0) {
totalCount ++;
} else {
totalCount + = 2;
}
if (totalCount >= cutCount) {
newStr += charStr.charAt(i);
break;
}else {
newStr += charStr.charAt(i);
}
}
return newStr;
}
js to judge whether the browser
judges whether it is an IE browser
if (document.all || !!window.ActiveXObject){
alert("IE browser");
}else{
alert("Non-IE browser");
}
Judgment is IE
var isIE = !! window.ActiveXObject;
var isIE6=isIE&&!window.XMLHttpRequest;
var isIE8 = isIE && !! document.documentMode;
var isIE7=isIE&&!isIE6&&!isIE8;
if (isIE){
if (isIE6){
alert(”ie6″);
}else if (isIE8){
alert(”ie8″);
}else if (isIE7){
alert(”ie7″);
}
}
Judge the browser
function getOs() {
var ua = navigator.userAgent；
if (ua.indexOf("MSIE 8.0") > 0) {
return "MSIE8";
}else if (ua.indexOf("MSIE 6.0") > 0) {
return "MSIE6";
}else if (ua.indexOf("MSIE 7.0") > 0) {
return "MSIE7";
}else if (isFirefox = ua.indexOf("Firefox") > 0) {
return "Firefox";
}
if (ua.indexOf("Chrome") > 0) {
return "Chrome";
}else {
return "Other";
}
}
JS judges the size of two dates
//Get the date value and convert it to date format
//replace(/\-/g, "\/") is to convert the date into a long date format according to the validation expression
// This is a good judgment to make a judgment
function ValidateDate(beginDate,endDate) {
if (beginDate.length > 0 && endDate.length>0) {
var sDate = new Date(beginDate.replace(/\-/g, "\/"));
var eDate= new Date(endDate.replace(/\-/g, "\/"));
if (sDate > eDate) {
// start date is less than end date
return false;
}
return true;
}
}
Enter to submit
document.getElementById("id").onkeypress = function (event) {
event = (event) ? event : ((window.event) ? window.event : "")
keyCode = event.keyCode ? event.keyCode : (event.which ? event.which : event.charCode);
if (keyCode == 13) {
// submit operation
}
}
JS 写Cookie
function setCookie(name, value, expires, path, domain) {
if (!expires)
expires = -1;
if (!path)
path = "/";
var d = "" + name + "=" + value;
var e;
if (expires < 0) {
e = "";
}else if (expires == 0) {
var f = new Date(1970, 1, 1);
e = ";expires=" + f.toUTCString();
}else {
var now = new Date();
var f = new Date(now.getTime() + expires * 1000);
e = ";expires=" + f.toUTCString();
}
var dm;
if (!domain) {
dm = "";
}else {
dm = ";domain=" + domain;
}
document.cookie = name + "=" + value + ";path=" + path + e + dm;
};
JS read cookies
function readCookie(name) {
var nameEQ = name + "=";
var ca = document.cookie.split (';');
for (var i = 0; i < ca.length; i++) {
var c = ca[i];
while (c.charAt(0) == ' ') c = c.substring(1, c.length);
if (c.indexOf(nameEQ) == 0) {
return decodeURIComponent(c.substring(nameEQ.length, c.length))
}
}
return null
}
Ajax request
var ajax = function (args) {
var self = this;
this.options = {
type: 'GET',
async: true,
contentType: 'application/x-www-form-urlencoded',
url: 'about:blank',
data: null,
success: {},
error: {}
};
this.getXmlHttp = function () {
var xmlHttp;
try {
xmlhttp = new XMLHttpRequest();
}catch (e) {
try {
xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
}catch (e) {
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
}if (!xmlhttp) {
alert('Your browser does not support AJAX');
return false;
}
return xmlhttp;
};
this.send = function () {
C.each(self.options, function (key, val) {
self.options[key] = (args[key] == null) ? val : args[key];
});
var xmlHttp = new self.getXmlHttp();
if (self.options.type.toUpperCase() == 'GET') {
xmlHttp.open(self.options.type, self.options.url + (self.options.data == null ? "" : ((/[?]$/.test(self.options.url) ? '&' : '?') + self.options.data)), self.options.async);
}else {
xmlHttp.open(self.options.type, self.options.url, self.options.async);
xmlHttp.setRequestHeader('Content-Length', self.options.data.length);
}
xmlHttp.setRequestHeader('Content-Type', self.options.contentType);
xmlHttp.onreadystatechange = function () {
if (xmlHttp.readyState == 4) {
if (xmlHttp.status == 200 || xmlHttp.status == 0) { if (typeof self.options.success == 'function') self.options.success(xmlHttp.responseText);
xmlHttp = null;
}else {
if (typeof self.options.error == 'function')
self.options.error('Server Status: ' + xmlHttp.status);
}
}
};
xmlHttp.send(self.options.type.toUpperCase() == 'POST' ? self.options.data.toString() : null);
};
this.send();
};
JS StringBuilder usage
function StringBuilder() {
this.strings = new Array;
};
StringBuilder.prototype.append = function (str) {
this.strings.push(str);
};
StringBuilder.prototype.toString = function () {
return this.strings.join('');
};
JS replaces illegal characters mainly for special characters that appear in password authentication
function URLencode(sStr) {
return escape(sStr).replace(/\+/g, '%2B').replace(/\"/g, '%22').replace(/\'/g, '%27').replace(/\//g, '%2F');
};
Press Ctrl + Entert to submit the form directly
document.body.onkeydown = function (evt) {
evt = evt ? evt : (window.event ? window.event : null);
if (13 == evt.keyCode && evt.ctrlKey) {
evt.returnValue = false;
evt.cancel = true;
PostData();
}
};
Js remove spaces method
String.prototype.Trim = function(){
return this.replace(/(^\s*)|(\s*$)/g, "");
}
String.prototype.LTrim = function(){
return this.replace(/(^\s*)/g, "");
}
String.prototype.RTrim = function(){
return this.replace(/(\s*$)/g, "");
}