Simple javascript formatter. Supports tokens {{property}}, {{someobject.property}}, {{anotherobject.nestedobject.property}} Enjoy.

SimpleFormatter.js

    function fmt(tmpl, repls) {

        var res = tmpl.replace(
            /(?:\{\{|\%7B\%7B)(.*?)(?:\}\}|\%7D\%7D)/g,
            function (m) {
                return getPropertyFromVar(repls, m);
            }
        );

        return res;

    }

    function getPropertyFromVar(obj, m, errors) {
        var ret;
        var localobj = obj;


        var props = m.match(/(?:\{\{|%7B%7B)(.*?)(?:\}\}|%7D%7D)/);
        if (props) {
            var proppath = props[1].split(".");
            for (var i = 0; i < proppath.length; i++) {
                localobj = localobj[proppath[i]];
                if (typeof (localobj[proppath[i]]) != "undefined") break;
            }
            /* options typed or untyped json:*/
            ret = (localobj)
                ? ((localobj.content) ? localobj.content : localobj)
                : ((errors) ? "No value for '" + props[1] + "' (" + m + ")" : "");

        } else {
            ret = (errors) ? "No key in '" + m + "'" : "";
        }

        return ret;
    }