??? 没有依赖 js库

function StringBuilder(){
	this._element_ = new Array();
	this.append = function(item) {
		this._element_.push(item);
	}
	this.toString = function() {
		return this._element_.join("");
	}
	this.toJsonString = function() {
		return this._element_.join(",");
	}
	this.join = function(separator) {
		return this._element_.join(separator);
	}
	this.length = function() {
		return this._element_.length;
	}	
}
function Map() {
	this.elements = new Array();
	// 获取MAP元素个数
	this.size = function() {
		return this.elements.length;
	}
	// 判断MAP是否为空
	this.isEmpty = function() {
		return (this.elements.length < 1);
	}
	// 删除MAP所有元素
	this.clear = function() {
		this.elements = new Array();
	}
	// 向MAP中增加元素（key, value)
	this.put = function(_key, _value) {
		this.elements.push({key : _key,value : _value});
	}	
	//增加元素并覆盖
	this.putOverride = function(_key,_value){
		this.remove(_key);
		this.put(_key,_value);
	}
	// 删除指定KEY的元素，成功返回True，失败返回False
	this.remove = function(_key) {
		var bln = false;
		try {
			for (i = 0; i < this.elements.length; i++) {
				if (this.elements[i].key == _key) {
					this.elements.splice(i, 1);
					return true;
				}
			}
		} catch (e) {
			bln = false;
		}
		return bln;
	}

	// 获取指定KEY的元素值VALUE，失败返回NULL
	this.get = function(_key) {
		try {
			for (i = 0; i < this.elements.length; i++) {
				if (this.elements[i].key == _key) {
					return this.elements[i].value;
				}
			}
		} catch (e) {
			return null;
		}
	}
	// 获取指定索引的元素（使用element.key，element.value获取KEY和VALUE），失败返回NULL
	this.element = function(_index) {
		if (_index < 0 || _index >= this.elements.length) {
			return null;
		}
		return this.elements[_index];
	}
	// 判断MAP中是否含有指定KEY的元素
	this.containsKey = function(_key) {
		var bln = false;
		try {
			for (i = 0; i < this.elements.length; i++) {
				if (this.elements[i].key == _key) {
					bln = true;
				}
			}
		} catch (e) {
			bln = false;
		}
		return bln;
	}
	// 判断MAP中是否含有指定VALUE的元素
	this.containsValue = function(_value) {
		var bln = false;
		try {
			for (i = 0; i < this.elements.length; i++) {
				if (this.elements[i].value == _value) {
					bln = true;
				}
			}
		} catch (e) {
			bln = false;
		}
		return bln;
	}
	// 获取MAP中所有VALUE的数组（ARRAY）
	this.values = function() {
		var arr = new Array();
		for (i = 0; i < this.elements.length; i++) {
			arr.push(this.elements[i].value);
		}
		return arr;
	}
	// 获取MAP中所有KEY的数组（ARRAY）
	this.keys = function() {
		var arr = new Array();
		for (i = 0; i < this.elements.length; i++) {
			arr.push(this.elements[i].key);
		}
		return arr;
	}
}

?? /*form 转换为json 字符串*/

function form2Json(formName){
var form=document.getElementById(formName);
var sb=new StringBuilder();var rcs=new Map();
	for ( var i = 0; i < form.elements.length; i++){
		var element = form.elements[i];	var name = element.name;
		if (typeof (name) === "undefined" || (name === null) || (name.length === 0)){continue;}
		var tagName = element.tagName;		
		if(tagName ==='INPUT'||tagName === 'TEXTAREA'){var type = element.type;
			if ((type === 'text')||(type === 'password') || (type === 'hidden') || (tagName === 'TEXTAREA')){
				sb.append("\""+name+"\":\""+encodeURIComponent(element.value.replace(/\r\n/ig,""))+"\"");
			}else if((type === 'checkbox') || (type === 'radio')){
				rcs.putOverride(name,type);
			}else{continue;}
		}else if (tagName === 'SELECT'){var oc = element.options.length;
			for ( var j = 0; j <oc; j++){
				if (element.options[j].selected){sb.append("\""+name+"\":\""+(element.value)+"\"");}
			}
		}
	}	
	if(rcs.size()>0){
		for(var i=0;i<rcs.size();i++){
		var r=rcs.element(i);var radio="";
			var d=document.getElementsByName(r.key);
			if(r.value==="radio"){
				for(j=0;j<d.length;j++){
					if(d[j].checked){radio=d[j].value;}
				}				
			}else{
				for(j=0;j<d.length;j++){
					if(d[j].checked){radi