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JavaScript NameSpace

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(function(){
    function $(id){
        return document.getElementById(id);
    }
    function alertNodeName(id){
        alert($(id).nodeName);
    }
})();
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(function(){
    if(!window.myNamespace){window['myNameSpace']={};}
    function $(id){
        return document.getElementById(id);
    }
    function alertNodeName(id){
        alert($(id).nodeName);
    }
})();
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(function(){
    if(!window.myNamespace){window['myNameSpace']={};}
    function $(id){
        return document.getElementById(id);
    }
    function alertNodeName(id){
        alert($(id).nodeName);
    }
    window['myNameSpace']['showNodeName'] = alertNodeName;
})();
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
 <HEAD>
  <TITLE> New Document </TITLE>
  <META NAME="Generator" CONTENT="EditPlus">


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