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\"/>Add to del.icio.us</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\"/>Digg This!</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\"/>Share on Facebook</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\"/>Google Bookmark This</a>";
}