函数作用域

<script>
 
 var name="docname";
 var value="docvalue";
 function Desk(){
this.name="deskname";
this.value="deskvalue";
 }
 Desk.prototype.sume=function(massage){
alert(this.name);
alert(massage);
}
 var desk1=new Desk();
 desk1.sume(this.value);/*deskname docvalue;*/
</script>