JS.Template

// Simple JavaScript Templating
// John Resig - http://ejohn.org/ - MIT Licensed
(function(){
  var cache = {};
 
  this.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(/[
	
]/g, " ")
          .split("<%").join("	")
          .replace(/((^|%>)[^	]*)'/g, "$1
")
          .replace(/	=(.*?)%>/g, "',$1,'")
          .split("	").join("');")
          .split("%>").join("p.push('")
          .split("
").join("\'")
      + "');}return p.join('');");
   
    // Provide some basic currying to the user
    return data ? fn( data ) : fn;
  };
})();

<script type="text/html" id="user_tmpl">
  <% for ( var i = 0; i < users.length; i++ ) { %>
    <li><a href="<%=users[i].url%>"><%=users[i].name%></a></li>
  <% } %>
</script>

var results = document.getElementById("results");
results.innerHTML = tmpl("item_tmpl", dataObject);