// ==UserScript==
// @name           Link Google PDF Viewer
// @namespace      http://i.i.ishikawa-nct.ac.jp/
// @include        http://*
// @include        https://*
// ==/UserScript==

(function(){
	var viewer_url = "http://docs.google.com/viewer?url=";
	var pdf_url = /\.pdf$/i;
	
	var links = document.getElementsByTagName("a");
	for (var i = 0, l = links.length; i < l; i++) {
		var a = links[i];
		var url = String(a.href);
		if (url.match(pdf_url)) {
			a.href = viewer_url + encodeURIComponent(url);
		}
	}
})()