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<script type="text/javascript"> 
// Authors Birdshome, 麻袋@博客園 改版 phito,彭海濤 
Object.prototype.Clone = function() 
{ 
var objClone; 
if ( this.constructor == Object ) objClone = new this.constructor(); 
else objClone = new this.constructor(this.valueOf()); 
for ( var key in this ) 
{ 
if ( objClone[key] != this[key] ) 
{ 
if ( typeof(this[key]) == 'object' ) 
{ 
objClone[key] = this[key].Clone(); 
} 
else 
{ 
objClone[key] = this[key]; 
} 
} 
} 
objClone.toString = this.toString; 
objClone.valueOf = this.valueOf; 
return objClone; 
} 
function Hashtable() { 
this.clear = hashtable_clear; 
this.containsKey = hashtable_containsKey; 
this.containsValue = hashtable_containsValue; 
this.get = hashtable_get; 
this.isEmpty = hashtable_isEmpty; 
this.keys = hashtable_keys; 
this.put = hashtable_put; 
this.remove = hashtable_remove; 
this.size = hashtable_size; 
this.toString = hashtable_toString; 
this.values = hashtable_values; 
this.hashtable = new Object(); 
this.set = hashtable_set; 
this.valueOf = hashtable_valueOf; 
this.clone = hashtable_clone; 
this.ignoreupperlower = true; 
//是否忽略大小寫(xiě) 
} 
/*=======Private methods for internal use only========*/ 
function hashtable_clone(){ 
return this.Clone(); 
} 
function hashtable_put(key, value) { 
if (this.ignoreupperlower && typeof(key) == "string") { 
key = key.toUpperCase(); 
} 
if (key == null || value == null) { 
throw "NullPointerException {" + key + "},{" + value + "}"; 
} else { 
this.hashtable[key] = value; 
} 
} 
function hashtable_set(key, value) { 
if (this.ignoreupperlower && typeof(key) == "string") { 
key = key.toUpperCase(); 
} 
if (this.containsKey(key)) { 
this.remove(key); 
} 
this.put(key, value); 
} 
function hashtable_get(key) { 
if (this.ignoreupperlower && typeof(key) == "string") { 
key = key.toUpperCase(); 
} 
return this.hashtable[key]; 
} 
function hashtable_valueOf(key, defvalue) { 
var ret = this.get(key); 
if (typeof(ret) == "undefined") { 
return defvalue; 
} 
return ret; 
} 
function hashtable_remove(key) { 
if (this.containsKey(key)) { 
delete this.hashtable[key] ; 
} 
} 
function hashtable_isEmpty() { 
return (parseInt(this.size()) == 0) ? true: false; 
} 
function hashtable_size() { 
var size = 0; 
for (var i in this.hashtable) { 
if(typeof(this.hashtable[i])=="function"){ 
continue; 
} 
if (this.hashtable[i] != null) { 
size++; 
} 
} 
return size; 
} 
function hashtable_toString() { 
var result = ""; 
for (var i in this.hashtable) { 
if(typeof(this.hashtable[i])=="function"){ 
continue; 
} 
if (this.hashtable[i] != null) { 
result += "{" + i + ":" + this.hashtable[i] + "}\n"; 
} 
} 
return result; 
} 
function hashtable_clear() { 
this.hashtable = new Object(); 
} 
function hashtable_containsKey(key) { 
if (this.ignoreupperlower && typeof(key) == "string") { 
key = key.toUpperCase(); 
} 
var exists = false; 
for (var i in this.hashtable) { 
if(typeof(this.hashtable[i])=="function"){ 
continue; 
} 
if (i == key && this.hashtable[i] != null) { 
exists = true; 
break; 
} 
} 
return exists; 
} 
function hashtable_containsValue(value) { 
var contains = false; 
if (value != null) { 
for (var i in this.hashtable) { 
if(typeof(this.hashtable[i])=="function"){ 
continue; 
} 
if (this.hashtable[i] == value) { 
contains = true; 
break; 
} 
} 
} 
return contains; 
} 
function hashtable_values() { 
var values = new Object(); 
for (var i in this.hashtable) { 
if(typeof(this.hashtable[i])=="function"){ 
continue; 
} 
if (this.hashtable[i] != null) values.push(this.hashtable[i]); 
} 
return values; 
} 
function hashtable_keys() { 
var keys = new Object(); 
for (var i in this.hashtable) { 
if(typeof(this.hashtable[i])=="function"){ 
continue; 
} 
keys.push(i); 
} 
return keys; 
} 
function test() { 
var ht = new Hashtable(); 
ht.put("3", "Jackson"); 
ht.put("2", "Tom"); 
ht.put("4", 3); 
ht.set("length", 445555); 
ht.set("ddd", "ddd"); 
ht.set("index", "ddd"); 
var et = ht.toString(); 
ht.ignoreupperlower = false; 
//忽略大小寫(xiě) 
ht.clear(); 
ht.put("3", "Jackson"); 
ht.put("2", "Tom"); 
ht.remove("2"); 
ht.put("4", 3); 
ht.set("length", 5); 
//如果用new Array的話該項(xiàng)會(huì)設(shè)置Array的長(zhǎng)度 
ht.set("index", "ddd"); 
ht.set("ddd", "ddd"); 
alert(et + "" + ht.toString() + "" + ht.size()); 
var cloneobj=ht.clone(); 
alert(cloneobj.toString()); 
} 
</script> 
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<body onload="test()"> 
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