arguments.callee和arguments.callee.caller的却别

<html>
    <head>
        <script type="text/javascript">
             function handleClick(abc)
            {
                 var div=document.createElement("div");
                div.innerHTML=abc;
                
                document.body.appendChild(div);                
            }

            

             function processArray(items,process,callback)
            {                            
                 var todo=items.concat(); // 克隆数组

                setTimeout( function(){
                     var item=todo.shift();
                    process(item);
                    
                     if(todo.length>0)                     
                    {
                        setTimeout(argument.callee,25);
                    }
                     else
                    {
                        callback(items);
                    }
                },25)
            }

             function test()
            {
                 var items1=[123,234,345,456,567,678,789,890];
                
                processArray(items1,handleClick, function(){document.write("done");})
            }

             function check()
            {                                            
                document.write("arguments:" + arguments.length +'<br>');  
                document.write("arguments.callee:" + arguments.callee.length   +'<br>'); 
                alert(arguments.callee.caller.toString());
                alert(arguments.callee.toString()); 
            }  
          
             function f(x, y, z){                             
                document.write("arguments:" + arguments.length +'<br>');  
                document.write("arguments.callee:" + arguments.callee.length   +'<br>');   
                check(arguments);                  
            }  
           
        </script>    
    </head>
    <body>
        <input type="button" onclick="handleClick()" value="Cliek Me"/>
        <input type="button" onclick="f(1,2)" value="test"/>
    </body>
</html>

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