Social Utilities and Javascript Current Page Detection

I’m trying to share personal web pages to any number of the social utilities (i.e. Facebook) out there now. But instead of trying to hard-code every single page url into the “Share to…” code, I was trying to get the page’s url automatically detected and inserted using Javascript. The “Share to…” code and Javascript’s “Detect Current Url” code work correctly independent of each other… I just can’t make them work together. Thoughts?

Below is what I ended up with:

[CODE]
<script type=”text/javascript”>

function currentUrl()
{
return(document.location);
}

function facebook(T, C, U, L)
{
var targetUrl = ‘http://www.facebook.com/sharer.php?u=$document.write(currentUrl())&t=$Title of Page&’ + ‘t=’ + encodeURIComponent(T)
+ ‘&c=’ + encodeURIComponent(C) + ‘&u=’ + encodeURIComponent(U) + ‘&l=’ + L;
window.open(targetUrl);
}

</script>

<a href=”javascript:facebook(‘Testing Post To Facebook’, ‘<p>Testing 1… 2… 3…<i>4… 5…. 6…</i></p>’, ‘document.write(currentUrl())’ &t=$Title of Page&’, 3)”>
<img src=”link-facebook.gif” border=”0″ alt=”Post to Facebook!” /></a>

[/CODE]

“document.write(currentUrl())” inside the “a href” tag seems to be where the whole thing falls apart as actual urls work perfectly.

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