$(document).ready(function() {

	var filetypes = /\.{zip|pdf}$/i;

	$('a').click(function() {
		
		var href = $(this).attr('href');
		
		// check if link is external
		if ((href.match(/^https?\:/i)) && (!href.match(document.domain))){
			var extLink = href.replace(/^https?\:\/\//i, '');
			_gaq.push(['_trackEvent', 'External', extLink]);
		}
		
		
		// check if link is a download
		if (href.match(filetypes)) {
			_gaq.push(['_trackEvent', 'Download', href]);
		}
		
	});
	
});