tmpl.js

/* Simple JavaScript Templating
   John Resig - http://ejohn.org/ - MIT Licensed */
(function () {
    var cache = {};

    Stitches.tmpl = function tmpl(str, data) {
        /* Figure out if we're getting a template, or if we need to
           load the template - and be sure to cache the result. */
        var fn = !/\W/.test(str) ? cache[str] = cache[str] || tmpl(document.getElementById(str).innerHTML) :

        /* Generate a reusable function that will serve as a template
           generator (and which will be cached). */
        new Function("obj", "var p=[],print=function(){p.push.apply(p,arguments);};" +

        /* Introduce the data as local variables using with(){} */
        "with(obj){p.push('" +

        /* Convert the template into pure JavaScript */
        str.replace(/[\r\t\n]/g, " ").split("<%").join("\t").replace(/((^|%>)[^\t]*)'/g, "$1\r").replace(/\t=(.*?)%>/g, "',$1,'").split("\t").join("');").split("%>").join("p.push('").split("\r").join("\\'") + "');}return p.join('');");

        /* Provide some basic currying to the user */
        return data ? fn(data) : fn;
    };
})();