micro2.js

(function() {
    var cache = {};

    this.tmpl2 = 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("data",
        "var p=[];" +

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

        // Convert the template into pure JavaScript
str.replace(/[\r\t\n]/g, " ")
   .replace(/'(?=[^%]*%>)/g,"\t")
   .split("'").join("\\'")
   .split("\t").join("'")
   .replace(/<%=(.+?)%>/g, "',$1,'")
   .split("<%").join("');")
   .split("%>").join("p.push('")
   + "');return p.join('');");
        // Provide some basic currying to the user
        return data ? fn(data) : fn;
    };
})();