在一个js文件中使用另外一个js文件的自定义对象

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//JSMap.js文件

* 用于实现页面 Map 对象，Key只能是String，对象随意
*/
var JSMap = function(){
this._entrys = new Array();
this.put = function(key, value){

  if (key == null || key == undefined) {
  return;
  }
   var index = this._getIndex(key);
  if (index == -1) {
      var entry = new Object();
      entry.key = key;
      entry.value = value;
      this._entrys[this._entrys.length] = entry;
  }else{
      this._entrys[index].value = value;
}
  };
  this.get = function(key){
  var index = this._getIndex(key);
  return (index != -1) ? this._entrys[index].value : null;
  };
  this.remove = function(key){
   var index = this._getIndex(key);
  if (index != -1) {
      this._entrys.splice(index, 1);
}
   };
   this.clear = function(){
this._entrys.length = 0;;
  };
  this.contains = function(key){
      var index = this._getIndex(key);
      return (index != -1) ? true : false;
  };
  this.getCount = function(){
      return this._entrys.length;
  };
  this.getEntrys = function(){
      return this._entrys;
  };
  this._getIndex = function(key){
  if (key == null || key == undefined) {
      return -1;
  }
      var _length = this._entrys.length;
      for (var i = 0; i < _length; i++) {
      var entry = this._entrys[i];
       if (entry == null || entry == undefined) {
      continue;
      }
      if (entry.key === key) {//equal
          return i;
      }
      }
      return -1;
  };
}

var map = new JSMap(); //准备在别的文件使用
//printf.js文件

document.write("<script language='javascript' src='JSMap.js'></script>");
map.put("1","HELLO");
alert(map.get("1"));

//mapTest.htm 文件

<html>
<head>
      <title>
          Map 对象测试
      </title>
      </head>
      <body>
          <script language="javascript" src="JSMap.js"></script>
          <script language="javascript" src="print.js">
              map.put("1",Title);
              alert(map.get("1"));
          </script>
      </body>
</html>

=============================================================================================

//Test.htm

//a.js

new_element = document.createElement("script");
new_element.setAttribute("type","text/javascript");
new_element.setAttribute("src","b.js");
document.body.appendChild(new_element);

function a(){
b();
}

//b.js

function b(){

alert("this is b.js");

}

==============================================================

//如果要调用一个js文件的静态方法可用这种方法

//Test.htm

//MFB_CH.js

function MFB_CH()
{

}
MFB_CH.getMFB_Front_Txt=function(key)
{
alert("this is MFB_CH.js");
}

//var.js

var my_element = document.createElement("script");
my_element.setAttribute("type","text/javascript");
my_element.setAttribute("src","MFB_CH.js");
document.getElementsByTagName("head")[0].appendChild(my_element);

function a()
{
alert("this is var.js");
MFB_CH.getMFB_Front_Txt();
}

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