Dynamic JS Variable in Head Script

[SusanHAllen]

Hello, I am attempting to customize the following script in the head portion of my page, based on a url parameter. The url parameter is being evaluated by a different script (proven by "alert" code), but the "galleryURL" variable is not being generated upon page load. Please help! Thank you.

<script type="text/javascript">
		    var flashvars = {};
		    var propertyID = getQueryVariable("PID");
		    flashvars.galleryURL = eval("Galleries/" + propertyID + "44/XML/gallery.xml");
		    var params = {};
		    params.allowfullscreen = true;
		    params.allowscriptaccess = "always";
		    params.bgcolor = "FFFFFF";
		    swfobject.embedSWF("simpleviewer.swf", "flashContent", "274", "365", "9.0.124", false, flashvars, params);
		</script>