var dtr_rules = [
								 {'selector':"#content H1", 'class_name':"dtr-h1"},
								 {'selector':"#content H2", 'class_name':"dtr-h2"},
								 ];

function _fix_text(txt) {
		return encodeURI(txt).replace("+", "%2b").replace("&", "%26");
}

function dtr_replace(el, cl) {
		var name = cl.replace("dtr-", "");
		var image_url = '/dtr/'+name+'/?text='+_fix_text(el.innerHTML);
		img = new Element("img", {'src':image_url, 'alt':el.innerHTML});
		el.setStyle("display", "none");
		img.injectAfter(el);
}

window.addEvent("domready", function () {
				for (var i=0; i<dtr_rules.length; i++) {
						var rule = dtr_rules[i];
						$$(rule.selector).each(function(el) {
										dtr_replace(el, rule.class_name) 
						});
				}
		});