Simple jQuery Templating based on John Resig's Micro Templating

tpl.js

(function($) {

 var tpl_cache = {};
 var fn_cache  = {};

 $.fn.tmpl = function(tpl, data, cb, fn, kd) {
    var cb = typeof(cb) == 'function' ? cb : null;
    var fn = fn || 'html';
    return this.each(function() {
        doTpl(tpl, data, $(this), cb, fn, kd);
    });
 }

 var doTpl = function(tpl, data, el, cb, fn, kd) {
    getTpl(tpl, function(tpl_data) {
        fn_cache[tpl] = fn_cache[tpl] ||

      new Function("obj",
        "var p=[],print=function(){p.push.apply(p,arguments);};" +
        "with(obj){p.push('" +
        tpl_data
          .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('');");

          var r = $(fn_cache[tpl].call(this, data));

          if(kd) {
            r.data(kd.key, kd.data);
          }

          el[fn](r);

      if(cb) {
        cb.call(el, data, r);
      }

    });
 }

 var getTpl = function(tpl, cb) {
    tpl_cache[tpl] ? cb.call(this, tpl_cache[tpl]) :
        $.get(tpl, function(data) {
            tpl_cache[tpl] = data;
            cb.call(this, tpl_cache[tpl]);
        });
 }

})(jQuery);