I can simulate the behaviour (here) of the given Facebook share icon (clicked) by:
In the body: replace the Div class="icons" that contains the Facebook image link, url & script link with:
<div class="icons">
<img src="webassist/social/icons/facebook.png" width="16" height="16" onclick="MM_openBrWindow('http://www.facebook.com/sharer.php?s=100&p[url]=http%3A%2F%2Fwww.yeractual.com%2Findex2.php','Facebook','status=yes,width=600,height=400')" /></a>
</div>
Ans between the <head></head tags, place the onload open winow script:
<script type="text/javascript">
function MM_openBrWindow(theURL,winName,features) { //v2.0
window.open(theURL,winName,features);
}
</script>
(But I am presumably not calling various other functions performed by the FB.Share script).
But this does open a window to share the chosen URL (in this case, www.yeractual.com/index2.php)