this 与window.onload 



var user ="THE WINDOW";
window.onload = function(){
    var user = "The window";
    var object = {
        user: "the person",
        getUserFunc: function (){
            return function(){
                return this.user; 
            };
        }
    };
    
    alert(object.getUserFunc()());  //THE WINDOW
    
};






 1 window.onload = function(){
 2     var user = "The window";
 3     var object = {
 4         user: "the person",
 5         getUserFunc: function (){
 6             return function(){
 7                 return this.user; //this指向window
 8             };
 9         }
10     };
11     
12     alert(object.getUserFunc()());  //undefined
13     
14 };




匿名函数的执行环境具有全局性。






		

		
posted @ 
2015-07-05 10:30 
liu玙 
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