Copy and paste the following code blocks into your site and replace '<url>' with the link you want to Share.
Text link:
<script>function fbs_click() {u=location.href;t=document.title;window.open('http://www.facebook.com/sharer.php?u='+encodeURIComponent(u)+'&t='+encodeURIComponent(t),'sharer','toolbar=0,status=0,width=626,height=436');return false;}</script><a rel="nofollow" href="http://www.facebook.com/share.php?u=<;url>" onclick="return fbs_click()" target="_blank">Share on Facebook</a>
Small icon and text:
<script>function fbs_click() {u=location.href;t=document.title;window.open('http://www.facebook.com/sharer.php?u='+encodeURIComponent(u)+'&t='+encodeURIComponent(t),'sharer','toolbar=0,status=0,width=626,height=436');return
false;}</script><style> html .fb_share_link { padding:2px 0
0 20px; height:16px; background:url(http://static.ak.facebook.com/images/share/facebook_share_icon.gif?6:26981) no-repeat top left; }</style><a rel="nofollow" href="http://www.facebook.com/share.php?u=<;url>" onclick="return fbs_click()" target="_blank" class="fb_share_link">Share on Facebook</a>
Icon only:
<script>function fbs_click() {u=location.href;t=document.title;window.open('http://www.facebook.com/sharer.php?u='+encodeURIComponent(u)+'&t='+encodeURIComponent(t),'sharer','toolbar=0,status=0,width=626,height=436');return
false;}</script><style> html .fb_share_button { display:
-moz-inline-block; display:inline-block; padding:1px 20px 0 5px;
height:15px; border:1px solid #d8dfea;
background:url(http://static.ak.facebook.com/images/share/facebook_share_icon.gif?6:26981)
no-repeat top right; } html .fb_share_button:hover { color:#fff;
border-color:#295582; background:#3b5998
url(http://static.ak.facebook.com/images/share/facebook_share_icon.gif?6:26981)
no-repeat top right; text-decoration:none; } </style> <a
rel="nofollow" href="http://www.facebook.com/share.php?u=<;url>" class="fb_share_button" onclick="return fbs_click()" target="_blank" style="text-decoration:none;">Share</a>
Source :http://askville.amazon.com/add-Share-Facebook-button-webpage/AnswerViewer.do?requestId=1539369
