/* some basic wob functions

	most - if not all - of them require prototype
*/
/**
 * Greps all <a> tags with attribute rel="external" and
 * inserts a target="_blank" into the DOM tree.
 */
function externalLinks() {
	var anchors = $$('a[rel="external"]');
	for (var i=0; i<anchors.length; i++) {
		anchor = anchors[i];
		anchor.target = "_blank";
	}
}
document.observe("dom:loaded",externalLinks);
/**
 * add event listener to download links for Google Analytics tracking
 */
function observeDownloadLinks() {
	// fetch all a tags within div#container
	var links = $$('div[id="container"] a');
	if (links.length == 0) return;
	for (var i=0; i<links.length; i++) {
		if (links[i].href.length == 0) continue; // empty link ?
		var link_path = links[i].pathname;
		if (location.host == links[i].hostname) {
			if (link_path.match(/\.(doc|pdf|xls|ppt|zip|txt|vsd|vxd|rar|exe|wma|mov|avi|wmv|mp3)$/)) {
				// open PDF, DOC,... in a new Window
				if (link_path.match(/\.(pdf|doc|xls|ppt)$/)) links[i].target = "_blank";
				// observe the onclick event for google analytics
				links[i].observe('click', function(event) {
					evElement = Event.element(event);
					if (typeof(pageTracker) == 'object')
						pageTracker._trackPageview(evElement.pathname);
				})
			}
		}
	}
}
document.observe("dom:loaded",observeDownloadLinks);