function strip_tags(input, allowed) {
				//http://phpjs.org/functions/strip_tags/
				allowed = (((allowed || '') + '')
				.toLowerCase()
				.match(/<[a-z][a-z0-9]*>/g) || [])
				.join(''); // making sure the allowed arg is a string containing only tags in lowercase ()
				var tags = /<\/?([a-z][a-z0-9]*)\b[^>]*>/gi,
				commentsAndPhpTags = /|<\?(?:php)?[\s\S]*?\?>/gi;
				return input.replace(commentsAndPhpTags, '')
				.replace(tags, function($0, $1) {
				  return allowed.indexOf('<' + $1.toLowerCase() + '>') > -1 ? $0 : '';
				});
			}