Event.observe(window, 'load', loadPdfLinks);

var links;
var key;
var newHrefs;
function  loadPdfLinks(event){
	links = $$('a');
	var debug = new String;
	var temp;
	var url = "getpdflinks.php";
	for(key in links){
		temp =  new String(links[key].href);
		if( temp.indexOf("get_pdf.php") >= 0 ){
			var myAjax = new Ajax.Request(
				url, 
				{
					method: 'post', 
					parameters: temp.split("?")[1] + "&key=" + key,
					onComplete: loadNewPdfLinks
				});
		}
	}
}

function loadNewPdfLinks(res){
	var resp = res.responseText.split(" ", 2);
	$$('a')[resp[0]].href = "/files/files/" + resp[1];
}