js命名空间（解决不同js lib冲突问题）

//声明一个全局对象Namespace，用来注册命名空间
Namespace = new Object();
// 全局对象仅仅存在register函数，参数为名称空间全路径
Namespace.register = function(wk_NS)
{
    var nsArray = wk_NS.split('.');
    var sEval = "";
    var sNS = "";
    for (var i = 0; i < nsArray.length; i++)
    {
        if (i != 0) sNS += ".";
        sNS += nsArray[i];
        sEval += "if (typeof(" + sNS + ") == 'undefined') " + sNS + " = new Object();"
    }
    if (sEval != "") eval(sEval);
}
/***
 * test demo 
 * Namespace.register("wk_test");注册命名空间
 * wk_test.jquery=$;将$添加到该命名空间
 * var p=wk_test.jquery("a").size();通过命名空间获取值
 * alert(p);
 */

 

实例demo

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<script type="text/javascript" src="namespace.js"></script>
<script type="text/javascript" src="jquery-1.7.1.min.js"></script>
<script type="text/javascript" src="jquery.validate.min.js"></script>
<script type="text/javascript" >
var data = "Core Selectors Attributes Traversing Manipulation CSS Events Effects Ajax Utilities".split(" ");
	Namespace.register("wk_vada");
	wk_vada=$;

	wk_vada(document).ready(function() {
	wk_vada("#signupForm").validate({
        rules: {
        	name: "required",
        	keyword:"required"
	  	},
        messages: {
        	name: "请输入姓名",
       		keyword: "请输入姓名"
        	}
 	}); 
 </script> 
<script type="text/javascript" src="jquery.autocomplete.min.js"></script>
<script type="text/javascript" >
	Namespace.register("wk_auto");
	wk_auto=$;
	
	wk_auto('#keyword').autocomplete(data).result(function(event, data, formatted) {
	    alert(data);
	});
	alert(wk_auto instanceof  wk_vada); //false
</script>

 注：借鉴无私的开源者