rem: temp.getElement('h1').set('class', 'first'); 
add: var heading = temp.getElement('h1'); if (heading) heading.set('class', 'first'); 
context: 	parse: function(markdown){		var html = ShowDown(markdown);		var temp = new Element('div').set('html', html);		var anchor = (/\{#(.*)\}/);		temp.getElements('h1, h2, h3, h4, h5, h6').each(function(h){			var matches = h.innerHTML.match(anchor);			if (matches) h.set('id', matches[1]);			h.innerHTML = h.innerHTML.replace(anchor, '');		});		temp.getElement('h1').set('class', 'first');		return temp;	},
meta: 6317	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/6317/ffab12d3ca21739cfc070c57fdb220ca5f412019/docs.js/clean/Docs/assets/docs.js