动态加载script 和 link

1.script

    EventUtil.addHandler(window, "load", function(event){
          var script = document.createElement("script");

          EventUtil.addHandler(script, "readystatechange", function(event){
          event=EventUtil.getEvent(event);
          var target = EventUtil.getTarget(event);
          if(target.readyState == "loaded" || target.readyState == "complete"){
               EventUtil.removeHandler(target, "readystatechange", arguments.callee);
               //alert("script loaded");
          }
      });

          script.src = "example.js";
          document.body.appendChild(script);
     })

2.link

    EventUtil.addHandler(window, "load", function(event){
          var link = document.createElement("link");
          link.type = "text/css";
          link.rel = "stylesheet";
          EventUtil.addHandler(link, "readystatechange", function(event){
          event=EventUtil.getEvent(event);
          var target = EventUtil.getTarget(event);
          if(target.readyState == "loaded" || target.readyState == "complete"){
               EventUtil.removeHandler(target, "readystatechange", arguments.callee);
               //alert("css loaded");
          }
      });

          link.href = "example.css";
          document.getElementsByTagName("head")[0].appendChild(link);
     })