用于自动添加Digg This!按钮的JavaScript

var main=document.getelementbyid("main");
var singlepost=false;
var firstpost;
var anchor;
for(var i=0;i<main.childnodes.length;i++)
{
  if(main.childnodes[i].classname&&main.childnodes[i].classname=="post")
  {
    var post=main.childnodes[i];
    if(!firstpost)
    {
      firstpost=post;
    }
    for(var j=0;j<post.childnodes.length;j++)
    {
      if(post.childnodes[j].classname&&post.childnodes[j].classname=="posthead")
      {
        var posthead=post.childnodes[j];
        if(posthead.childnodes[1]&&posthead.childnodes[1].tagname&&posthead.childnodes[1].tagname=="h2")
        {
          if(posthead.childnodes[1].childnodes[1]&&posthead.childnodes[1].childnodes[1].tagname&&posthead.childnodes[1].childnodes[1].tagname=="a")
          {
            anchor=posthead.childnodes[1].childnodes[1];
          }
          else
          {
            anchor=posthead.childnodes[1].childnodes[0];
          }
        }
        else
        {
          anchor=posthead.childnodes[0].childnodes[0];
        }
        anchor.style.fontsize="14pt";
        if(anchor.classname&&anchor.classname=="singleposttitle")
        {
          singlepost=true;
        }
      }
    }
  }
}
if(singlepost)
{
  var postfoot=document.createelement("div");
  firstpost.appendchild(postfoot);
  postfoot.classname="postfoot";
  postfoot.innerhtml="<a href=\"http://del.icio.us/post?v=4&url="+encodeuricomponent(location.href)+"&title="+encodeuricomponent(document.title)+"\"><img src=\http://del.icio.us/favicon.ico\ alt=\"add to del.icio.us\" border=\"0\"/><span>add to del.icio.us</span></a>";
  postfoot.innerhtml+="<a href=\"http://digg.com/submit?phase=2&url="+encodeuricomponent(location.href)+"&title="+encodeuricomponent(document.title)+"\"><img src=\http://digg.com/favicon.ico\ alt=\"digg this!\" border=\"0\"/><span>digg this!</span></a>";
  postfoot.innerhtml+="<a href=\"http://www.facebook.com/share.php?u="+encodeuricomponent(location.href)+"\"><img src=\http://www.facebook.com/favicon.ico\ alt=\"share on facebook\" border=\"0\"/><span>share on facebook</span></a>";
  postfoot.innerhtml+="<a href=\"http://www.google.com/bookmarks/mark?op=edit&bkmk="+encodeuricomponent(location.href)+"&title="+encodeuricomponent(document.title)+"\"><img src=\http://www.google.com/favicon.ico\ alt=\"google bookmark this\" border=\"0\"/><span>google bookmark this</span></a>";
}