A jQuery/Zepto template plugin based on MicroTemplate.

jQuery.template.js

(function($) {
  var cache = {};

  var partial = function(str) {
    return str.replace(/<%\+(.*)%>/, function(child, name) {
      name = name.trim();
      return !/[^\w-_]/.test(name) ? document.getElementById(name).innerHTML : name;
    });
  };

  var tmpl = function tmpl(str, data) {
    var fn = !/[^\w-_]/.test(str) ?
      cache[str] = cache[str] ||
      tmpl(document.getElementById(str).innerHTML) :

      new Function("obj",
        "var p=[]; with(obj){p.push('" +
        partial(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('');");

    return data ? fn(data) : fn;
  };

  $.extend({
    tmpl: tmpl
  });

  $.fn.extend({
    render: function(template, data) {
      $(this).html($.tmpl(template, data));
    }
  });

})(jQuery || Zepto);