Shock

TeX.addTags ([
    {
        name : 'b',
        args : [1],
        func : function (args) {
            return "<b>" + TeX.markup(args[0]) + "</b>";
        }
    },
    {
        name : 'i',
        args : [1],
        func : function (args) {
            return "<i>" + TeX.markup(args[0]) + "</i>";
        }
    },
    {
        name : 'u',
        args : [1],
        func : function (args) {
            return "<u>" + TeX.markup(args[0]) + "</u>";
        }
    },
    {
        name : 's',
        args : [1],
        func : function (args) {
            return "<s>" + TeX.markup(args[0]) + "</s>";
        }
    },
    {
        name : 'code',
        args : [1, 2],
        func : function (args) {
            var value, className = '';
            if (args.length == 2) {
                var lang  = (args[0] == '!') ?
                    'no-highlight' : TeX.lib.safeHTML(args[0]);
                className = ' class="' + lang + '"';
                value = args[1];
            } else {
                value = args[0];
            }
            return "<pre><code" + className + ">" + value + "</code></pre>";
        }
    },
    {
        name : 'url',
        args : [2],
        func : function (args) {
            var url = TeX.lib.safeHTML(args[0]);
            return "<a href='" + url + "'>" + TeX.markup(args[1]) + "</a>";
        }
    },
    {
        name : 'img',
        args : [1],
        func : function (args) {
            var src = TeX.lib.safeHTML(args[0]);
            return "<img src='" + src + "' />";
        }
    },
]);

TeX.addRules ([
    {
        name : 'safeHtml',
        func : function (string) {
            return TeX.lib.safeHTML(string);
        }
    },
    {
        name : 'newLines',
        func : function (string) {
            return string.split("\n").join("<br />");
        }
    },
    {
        name : 'liveUrls',
        func : function (string) {
            var urlRE = /((git|svn|ftp|http|https):\/\/(www\.)?|www.)(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/gi;
            return string.replace(urlRE, function(url) {
                var urlFull = (url.indexOf('www') === 0) ? "http://" + url : url;
                return "<a class='url' href='" + urlFull + "'>" + url + "</a>";
            });
        }
    },
    {
        name : 'liveEmails',
        func : function (string) {
            var emailRE = /[-a-z0-9!#$%&'*+\/=?^_`{|}~]+(\.[-a-z0-9!#$%&'*+\/=?^_`{|}~]+)*@([a-z0-9]([-a-z0-9]{0,61}[a-z0-9])?\.)*([a-z]{2,6})/gi;
            return string.replace(emailRE, function(email) {
                return "<a class='mail' href='mailto:" + email + "'>" + email + "</a>";
            })
        }
    }
]);