Javascript tree control script code _ javascript skills

Very nice js tree menu /*---------------------------------------------------------------------------*\
| Subject: JavaScript Framework
| Author: meizz
| Created: 2005-02-27
| Version: 2006-08-11
| -----------------------------------
| MSN: huangfr@msn.com QQ: 112889082
| Http://www.meizz.com Copyright (c) meizz MIT-style license
| The above copyright notice and this permission notice shall be
| Included in all copies or substantial portions of the Software
\*---------------------------------------------------------------------------*/

Window. System = function () {this. setHashCode ();}

System. debug = true; // false
System. _ codebase = {};
Try
{
If (window! = Parent & parent. System & parent. System. _ codebase)
System. _ codebase = parent. System. _ codebase;
Else if ("undefined "! = Typeof opener & opener. System & opener. System. _ codebase)
System. _ codebase = opener. System. _ codebase;
Else if ("undefined "! = Typeof dialogArguments & dialogArguments. System)
System. _ codebase = dialogArguments. System. _ codebase;
}
Catch (ex ){}

System. MISSING_ARGUMENT = "Missing argument ";
System. ARGUMENT_PARSE_ERROR = "The argument cannot be parsed ";
System. NOT_SUPPORTED_XMLHTTP = "Your browser do not support XMLHttp ";
System. FILE_NOT_FOUND = "File not found ";
System. MISCODING = "Maybe file encoding is not ANSI or UTF-8 ";
System. NAMESPACE_ERROR = "nonstandard namespace ";

System. hashCounter = 0;
System. currentVersion = "20060811 ";
Var t = document. getElementsByTagName ("SCRIPT ");
T = (System. scriptElement = t [t. length-1]). src. replace (// \/g ,"/");
System. in1_ate = function (d, s) {for (var I in s) d [I] = s [I]; return d ;};
System. path = (t. lastIndexOf ("/") <0 )? ".": T. substring (0, t. lastIndexOf ("/"));
System. getUniqueId = function () {return "mz _" + (System. hashCounter ++). toString (36 );};
System. toHashCode = function (e)
{
If ("undefined "! = Typeof e. hashCode) return e. hashCode;
Return e. hashCode = System. getUniqueId ();
};
System. supportsXmlHttp = function ()
{
Return "object" = typeof (System. _ xmlHttp | (System. _ xmlHttp = new XMLHttpRequest ()));
};
System. _ getPrototype = function (namespace, argu)
{
If ("undefined" = typeof System. _ prototypes [namespace]) return new System ();
For (var a = [], I = 0; I return eval ("new (System. _ prototypes ['"+ namespace +"']) ("+. join (",") + ")");
};
System. ie = navigator. userAgent. indexOf ("MSIE")> 0 &&! Window. opera;
System. ns = navigator. vendor = "Netscape ";
System. _ alert = function (msg) {if (System. debug) alert (msg );};
System. _ parseResponseText = function (s)
{
If (null = s | "\ uFFFD" = s. charAt (0) {System. _ alert (System. MISCODING); return "";}
If ("\ xef" = s. charAt (0) s = s. substr (3); // for firefox
Return s. replace (/(^ | \ n) \ s * \/+ \ s * (Using | Import | Include) \ (\ "| \')) /g, "$1 $2 ");
};

If (window. ActiveXObject & (System. ie |! Window. XMLHttpRequest ))
{
Window. XMLHttpRequest = function ()
{
Var msxmls = ['msxml3', 'msxml2', 'Microsoft '], ex;
For (var I = 0; I Try {return new ActiveXObject (msxmls [I] + '. xmlhttp')} catch (ex ){}
System. _ xmlHttp = "mz"; throw new Error (System. NOT_SUPPORTED_XMLHTTP );
}
}
System. load = function (namespace, path)
{
Try
{
If (System. supportsXmlHttp () {path = System. _ mapPath (namespace, path );
Var x = System. _ xmlHttp; x. open ("GET", path, false); x. send (null );
If (x. readyState = 4)
{
If (x. status = 0 |/^ file \:/I. test (path ))
Return System. _ parseResponseText (x. responseText );
Else if (x. status == 200) return System. _ parseResponseText (x. responseText );
Else if (x. status = 404) System. _ alert (namespace + "\ n" + System. FILE_NOT_FOUND );
Else throw new Error (x. status + ":" + x. statusText );}
} Else System. _ alert (System. NOT_SUPPORTED_XMLHTTP );
}
Catch (ex) {System. _ alert (namespace + "\ n" + ex. message);} return "";
};
System. _ eval = function (namespace, path)
{
// Alert ("System. _ eval (\" "+ namespace +" \ ") = \ r \ n" + System. _ codebase [namespace]);
Trypolicif({execscript=window.exe cScript (System. _ codebase [namespace]); else
{
Var script = document. createElement ("SCRIPT"); script. type = "text/javascript ";
Script. innerHTML = "eval (System. _ codebase ['" + namespace + "']);";
Document. getElementsByTagName ("HEAD") [0]. appendChild (script );
SetTimeout (function () {script. parentNode. removeChild (script)}, 99 );
} Catch (ex) {System. _ alert ("Syntax error on load" + namespace );}
System. _ existences [namespace] = System. _ mapPath (namespace, path );
};
System. _ exist = function (namespace, path)
{
If ("undefined" = typeof System. _ existences [namespace]) return false;
Return System. _ existences [namespace] = System. _ mapPath (namespace, path );
};
System. _ mapPath = function (namespace, path)
{
If ("string" = typeof path & path. length> 3) return path. toLowerCase ();
Var p = (System. path + "/" + namespace. replace (/\./g, "/") + ". js? 6.1.3 "). toLowerCase ();
Return p + ("undefined" = typeof path | path )? "":"? T = "+ Math. random ());
};

Window. Using = function (namespace, path, rename)
{
If (System. _ exist (namespace, path )){
Var s = window [namespace. substr (namespace. lastIndexOf (".") + 1)];
If (s! = System. _ prototypes [namespace]) s = System. _ prototypes [namespace]; return}
Var code = namespace + "."; if (! /(^ | \.) [\ W \ $] +) + $/. test (namespace ))
Throw new Error (namespace + System. NAMESPACE_ERROR );
For (var I = code. indexOf ("."); I>-1; I = code. indexOf (".", I + 1 )){
Var e = code. substring (0, I), s = (e. indexOf (".") =-1 )? "Window [\" "+ e +" \ "]": e;
If (e & "undefined" = typeof (s )){
Eval (s + "= function () {return System. _ getPrototype (\" "+ e +" \ ", arguments )}");}}
If ("undefined" = typeof path & "string" = typeof System. _ codebase [namespace])
{
System. _ eval (namespace, path);} else {if (code = System. load (namespace, path )){
E = "$" + System. getUniqueId () + "_ id" + new Date (). getTime () + "$ ";
S = "function" + e + "() {\ r \ n" + code + "; \ r \ nSystem. _ prototypes ['";
Code = namespace. substr (namespace. lastIndexOf (".") + 1 );
S + = namespace + "'] = window ['" + (rename | code) + "'] =" + code + "; \ r \ n} "+ e + "();";
System. _ codebase [namespace] = s; s = ""; System. _ eval (namespace, path );}
}
};
Window. Import = function (namespace, path, rename) {Using (namespace, path, rename )};
Window. Instance = function (hashCode) {return System. _ instances [hashCode]};
Window. Include = function (namespace, path)
{
If (System. _ exist (namespace, path) return;
Var code; if (! /(^ | \.) [\ W \ $] +) + $/. test (namespace ))
Throw new Error (namespace + System. NAMESPACE_ERROR );
If ("undefined" = typeof path & "string" = typeof (System. _ codebase [namespace])
{
System. _ eval (namespace, path);} else if (System. supportsXmlHttp ()){
If (code = System. load (namespace, path) {System. _ codebase [namespace] = code;
System. _ eval (namespace, path) ;}} else {
Var script = document. createElement ("SCRIPT"); script. type = "text/javascript ";
Script. src = System. _ existences [namespace] = System. _ mapPath (namespace, path );
Document. getElementsByTagName ("HEAD") [0]. appendChild (script );
SetTimeout (function () {script. parentNode. removeChild (script)}, 99 );
}
};

Function. READ = 1; Function. WRITE = 2; Function. READ_WRITE = 3;
Function. prototype. addProperty = function (name, initValue, r_w)
{
Var capital = name. charAt (0). toUpperCase () + name. substr (1 );
R_w = r_w | Function. READ_WRITE; name = "_" + name; var p = this. prototype;
If ("undefined "! = Typeof initValue) p [name] = initValue;
If (r_w & Function. READ) p ["get" + capital] = function () {return this [name];};
If (r_w & Function. WRITE) p ["set" + capital] = function (v) {this [name] = v ;};
};
Function. prototype. Extends = function (SuperClass, ClassName)
{
Var op = this. prototype, I, p = this. prototype = new SuperClass ();
If (ClassName) p. _ className = ClassName; for (I in op) p [I] = op [I];
If (p. hashCode) delete System. _ instances [p. hashCode]; return p;
};
System. _ instances = {};
System. _ prototypes =
{
"System": System,
"System. Object": System,
"System. Event": System. Event
};
System. _ existences =
{
"System": System. _ mapPath ("System "),
"System. Event": System. _ mapPath ("System. Event "),
"System. Object": System. _ mapPath ("System. Object ")
};
T = System. Extends (Object, "System"); System. Object = System;
T. decontrol = function () {var t; if (t = this. hashCode) delete System. _ instances [t]};
T. addEventListeners = function (type, handle)
{
If ("function "! = Typeof handle)
Throw new Error (this + "addEventListener:" + handle + "is not a function ");
If (! This. _ listeners) this. _ listeners = {};
Var id = System. toHashCode (handle), t = this. _ listeners;
If ("object "! = Typeof t [type]) t [type] ={}; t [type] [id] = handle;
};
T. removeEventListener = function (type, handle)
{
If (! This. _ listeners) this. _ listeners = {}; var t = this. _ listeners;
If (! T [type]) return; var id = System. toHashCode (handle );
If (t [type] [id]) delete t [type] [id]; if (t [type]) delete t [type];
};
T. dispatchEvent = function (evt)
{
If (! This. _ listeners) this. _ listeners = {};
Var I, t = this. _ listeners, p = evt. type;
Evt.tar get = evt. srcElement = this; if (this [p]) this [p] (evt );
If ("object" = typeof t [p]) for (I in t [p]) t [p] [I]. call (this, evt );
Delete evt.tar get; delete evt. srcElement; return evt. returnValue;
};
T. setHashCode = function ()
{
System. _ instances [(this. hashCode = System. getUniqueId ()] = this;
};
T. getHashCode = function ()
{
If (! This. hashCode) this. setHashCode (); return this. hashCode;
};
T. toString = function () {return "[object" + (this. _ className | "Object") + "]" ;};
System. Event = function (type) {this. type = type ;};
T = System. Event. Extends (System, "System. Event ");
T. returnValue = true;
T. cancelBubble = false;
T.tar get = t. srcElement = null;
T. stopPropagation = function () {this. cancelBubble = true ;};
T. preventDefault = function () {this. returnValue = false ;};

If (System. ie &&! System. debug) Include ("System. Plugins. IE"); // IE UserData
If (window. opera) Include ("System. Plugins. Opera"); // Opera support
Include ("System. Global ");

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