$.ajax({ 
                    type: "POST",datatype: "JSONP",url: "path",success: function(msg){
                    var e = document.createElement("div");
                    e.id = "ads";
                    document.body.appendChild(e);
                    $("#ads").html(msg);

                    }
           });@H_502_2@ 
 
当我在浏览器中打开code.html文件时,它会出错：
 
  
 
**"XMLHttpRequest cannot load file://..... Origin null is not allowed by Access-Control-Allow-Origin."**@H_502_2@ 
 
请帮我！！如何避免这个问题