A summary of common JavaScript methods

var browserinfo = {
UserAgent:navigator.userAgent.toLowerCase ()
Isandroid:boolean (Navigator.userAgent.match (/android/ig)),
Isiphone:boolean (Navigator.userAgent.match (/iphone|ipod/ig)),
Isipad:boolean (Navigator.userAgent.match (/ipad/ig)),
Isweixin:boolean (Navigator.userAgent.match (/micromessenger/ig)),
}


function Strlength (str) {
var a = 0;
for (var i = 0; i < str.length; i++) {
if (Str.charcodeat (i) > 255)
A + = 2;//2 increase in expected count
Else
a++;
}
return A;
}
Get the parameters in the URL

function Getquerystringregexp (name,url) {
var reg = new RegExp ("(^|\?| &) "+ name +" = ([^&]*) (\s|&|$) "," I ");
if (reg.test (URL)) return decodeURIComponent (Regexp.$2.replace (/+/g, "")); Return "";
}


function Eventbind (obj, EventType, callBack) {
if (Obj.addeventlistener) {
Obj.addeventlistener (EventType, CallBack, false);
}
else if (window.attachevent) {
Obj.attachevent (' on ' + EventType, callBack);
}
else {
obj[' on ' + eventtype] = CallBack;
}
};
Eventbind (document, ' click ', Bodyclick);


function Getjsversion () {
var n = navigator;
var u = n.useragent;
var apn = N.appname;
var v = n.appversion;
var ie = v.indexof (' MSIE ');
if (ie > 0) {
APV = parseint (i = v.substring (ie + 5));
if (APV > 3) {
APV = parsefloat (i);
}
} else {
APV = parsefloat (v);
}
var Isie = (APN = = ' Microsoft Internet Explorer ');
var Ismac = (u.indexof (' Mac ') >= 0);
var javascriptversion = "1.0";
if (String && string.prototype) {
Javascriptversion = ' 1.1 ';
if (Javascriptversion.match) {
javascriptversion = ' 1.2 ';
var tm = new Date;
if (tm.setutcdate) {
Javascriptversion = ' 1.3 ';
if (Isie && ismac && APV >= 5) javascriptversion = ' 1.4 ';
var pn = 0;
if (pn.toprecision) {
javascriptversion = ' 1.5 ';
A = new Array;
if (A.foreach) {
Javascriptversion = ' 1.6 ';
i = 0;
o = new Object;
TCF = new Function (' O ', ' var e,i=0;try{i=new Iterator (o)}catch (e) {}return i ');
i = TCF (o);
if (i && i.next) {
javascriptversion = ' 1.7 ';
}
}
}
}
}
}
return javascriptversion;
}

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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;
};


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;
}


var tmp = window.open ("About:blank", "", "Fullscreen=1")
Tmp.moveto (0, 0);
Tmp.resizeto (Screen.width +, screen.height);
Tmp.focus ();
Tmp.location.href = '//www.che168.com/pinggu/eva_ ' + msgresult.message[0] + '. html ';
var config_ = "left=0,top=0,width=" + (Window.screen.Width) + ", height=" + (window.screen.Height);
window.open ('//www.che168.com/pinggu/eva_ ' + msgresult.message[0] + '. html ', "Winhanle", config_);
Simulate form submission open a new page
var f = document.createelement ("form");
F.setattribute (' action ', '//www.che168.com/pinggu/eva_ ' + msgresult.message[0] + '. html ');
F.target = ' _blank ';
Document.body.appendChild (f);
F.submit ();


function SelectAll (objselect) {
if (objselect.checked = = True) {
$ ("Input[name= ' Chkid ')"). attr ("Checked", true);
$ ("Input[name= ' Chkall ')"). attr ("Checked", true);
}
else if (objselect.checked = = False) {
$ ("Input[name= ' Chkid ')"). attr ("checked", false);
$ ("Input[name= ' Chkall ')"). attr ("checked", false);
}
}


Determine if it is IE browser
if (document.all) {
Alert ("IE browser");
}else{
Alert ("Non-IE browser");
}
if (!! Window. ActiveXObject) {
Alert ("IE browser");
}else{
Alert ("Non-IE browser");
}
The judgment is IE several
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″");
}
}


function Getos () {
if (Navigator.userAgent.indexOf ("MSIE 8.0") > 0) {
return "MSIE8";
}
else if (navigator.userAgent.indexOf ("MSIE 6.0") > 0) {
return "MSIE6";
}
else if (navigator.userAgent.indexOf ("MSIE 7.0") > 0) {
return "MSIE7";
}
else if (Isfirefox = navigator.userAgent.indexOf ("Firefox") > 0) {
return "Firefox";
}
if (Navigator.userAgent.indexOf ("Chrome") > 0) {
return "Chrome";
}
else {
return "other";
}
}


To get the date value and convert it into a date format, replace (/-/g, "/") is converted to a date format based on the validation expression, so that you can judge the
function Validatedate () {
var begindate = $ ("#t_datestart"). Val ();
var endDate = $ ("#t_dateend"). Val ();
if (begindate.length > 0 && enddate.length>0) {
var sdate = new Date (Begindate.replace (/-/g, "/"));
var edate= new Date (Enddate.replace (/-/g, "/"));
if (Sdate > EDate) {
Alert (' Start date less than End Date ');
return false;
}
}
}


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;
}
}


$ ("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) {
$ ("Submitlogin"). OnClick ();
}
}


Timestart = new Date (). GetTime ();
Timesend = new Date (). GetTime ();
document.getElementById ("Time"). InnerHTML = Timesend-timestart;


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 = ";d omain=" + domain;
}
Document.cookie = name + "=" + Value + ";p ath=" + path + e + DM;
};


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
}


C.ajax = function (args) {
var = 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 = = | | 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 ();
};


function StringBuilder () {
This.strings = new Array;
};
StringBuilder.prototype.append = function (str) {
This.strings.push (str);
};
StringBuilder.prototype.toString = function () {
Return This.strings.join (");
};


function Loadjs (URL, fn) {
var ss = document.getelementsbyname (' script '),
loaded = false;
for (var i = 0, len = ss.length; i < Len; i++) {
if (ss[i].src && ss[i].getattribute (' src ') = = URL) {
loaded = true;
Break
}
}
if (loaded) {
if (fn && typeof fn! = ' undefined ' && fn instanceof Function) fn ();
return false;
}
var s = document.createelement (' script '),
b = false;
S.setattribute (' type ', ' text/javascript ');
S.setattribute (' src ', url);
S.onload = S.onreadystatechange = function () {
if (!b && (!this.readystate | | this.readystate = = ' Loaded ' | | this.readystate = = ' complete ')} {
B = true;
if (fn && typeof fn! = ' undefined ' && fn instanceof Function) fn ();
}
};
document.getElementsByTagName (' head ') [0].appendchild (s);
},
Bind:function (ObjId, EventType, callBack) {//bindings for any browser
var obj = document.getElementById (objId);
if (Obj.addeventlistener) {
Obj.addeventlistener (EventType, CallBack, false);
}
else if (window.attachevent) {
Obj.attachevent (' on ' + EventType, callBack);
}
else {
obj[' on ' + eventtype] = CallBack;
}
}
function Jsload (args) {
s = document.createelement ("script");
S.setattribute ("type", "Text/javascript");
S.setattribute ("src", args.url);
S.onload = S.onreadystatechange = function () {
if (!s.readystate | | s.readystate = = "Loaded" | | s.readystate = = "complete") {
if (typeof args.callback = = "function") args.callback (this, args);
S.onload = S.onreadystatechange = null;
try {
S.parentnode && S.parentnode.removechild (s);
} catch (e) {}
}
};
document.getElementsByTagName ("Head") [0].appendchild (s);
}


function Clearheadjs (SRC) {
var js = document.getelementsbytagname (' head ') [0].children;
var obj = null;
for (var i = 0; i < js.length; i++) {
if (js[i].tagname.tolowercase () = = "Script" && js[i].attributes[' src '].value.indexof (src) > 0) {
obj = Js[i];
}
}
document.getElementsByTagName (' head ') [0].removechild (obj);
};


function UrlEncode (SSTR) {
Return Escape (SSTR), replace (/+/g, '%2b '). Replace (/"/g, '%22 '). Replace (/'/g, '%27 '). Replace (///g, '%2f ');
};


Document.body.onkeydown = function (evt) {
EVT = evt? EVT: (window.event window.event:null);
if (= = Evt.keycode && evt.ctrlkey) {
Evt.returnvalue = false;
Evt.cancel = true;
PostData ();
}
};


function Getcurrentdate () {
var d = new Date ();
var y = d.getyear () +1900;
month = Add_zero (D.getmonth () + 1),
Days = Add_zero (D.getdate ()),
Hours = Add_zero (D.gethours ());
minutes = Add_zero (D.getminutes ()),
seconds = Add_zero (D.getseconds ());
var str = y + '-' + month + '-' + days + ' + hours + ': ' + minutes + ': ' + seconds;
return str;
};
function Add_zero (temp) {
if (temp <) return "0" + temp;
else return temp;
}


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, "");}


This. Clearheadjs = function (src) {
var js = document.getelementsbytagname (' head ') [0].children;
var obj = null;
for (var i = 0; i < js.length; i++) {
if (js[i].tagname.tolowercase () = = "Script" && js[i].attributes[' src '].value.indexof (src) > 0) {
obj = Js[i];
}
}
document.getElementsByTagName (' head ') [0].removechild (obj);
};


function CreateFrom (URL, params) {
var f = document.createelement ("form");
F.setattribute ("action", URL);
for (var i = 0; i < params.length; i++) {
var input = document.createelement ("input");
Input.setattribute ("type", "hidden");
Input.setattribute ("name", Params[i].paramname);
Input.setattribute ("value", params[i].paramvalue);
F.appendchild (input);
}
F.target = "_blank";
Document.body.appendChild (f);
F.submit ();
};


<script language= "JavaScript" >
var jsversion = 1.0;
</script>
<script language= "javascript1.1" >
Jsversion = 1.1;
</script>
<script language= "javascript1.2" >
Jsversion = 1.2;
</script>
<script language= "javascript1.3" >
Jsversion = 1.3;
</script>
<script language= "javascript1.4" >
Jsversion = 1.4;
</script>
<script language= "javascript1.5" >
Jsversion = 1.5;
</script>
<script language= "javascript1.6" >
Jsversion = 1.6;
</script>
<script language= "javascript1.7" >
Jsversion = 1.7;
</script>
<script language= "javascript1.8" >
Jsversion = 1.8;
</script>
<script language= "javascript1.9" >
Jsversion = 1.9;
</script>
<script language= "javascript2.0" >
jsversion = 2.0;
</script>
alert (jsversion);

A summary of common JavaScript methods