如何利用模板将HTML从JavaScript中抽离

function loadDialog(name, oncomplete) {
 var xhr = new XMLHttpRequest();
 xhr.open('get', '/js/dialog/'+name, true);
 xhr.onreadystatechange = function () {
  if(xhr.readyState == 4 && xhr.status == 200){
   var div = document.getElementById('dlg-holder');
   div.innerHTML = xhr.responseText;
   oncomplete();
  }else {
   //错误处理代码
  }
 };
 xhr.send(null);
}
//使用YUI的API
function loadDialog(name, oncomplete) {
 Y.one('#dlg-holder').log('/js/dialog/'+name,oncomplete);
}
//使用JQuery的API
function loadDialog(name, oncomplete) {
 $('#dlg-holder').load('/js/dialog/'+name, oncomplete);
}

function sprintf(text){
 var i=1,args=arguments;
 return text.replace(/%s/g, function(){
  return (i<args.length) ? args[i++] : '';
 });
}

<ul id = 'mylist'><!--<li id='item%s'><a href='%s'>%s</a></li>-->
 ...
</ul>

//格式化并插入DOM的方法定义
function addItem(url,text){
 var mylist = document.getElementById('mylist');
 var templateText = mylist.firstChild.nodeValue; //提取模板文本
 var result = sprintf(templateText,url,text);
 div.innerHTML = result;
 mylist.insertAdjacentHTML('beforeend', result);
}
//调用方法
addItem('/item/4', 'First item');
addItem('/item/4', 'Second item');

<script type='text/x-my-template' id='list-item'>
 <li><a href='%s'>%s</a></li>
</script>
function addItem(url,text){
 var mylist = document.getElementById('mylist');
 var script = document.getElementById('list-item');
 var templateText = script.text; //提取模板文本
 var result = sprintf(templateText,url,text);
 var div = document.createElement('div');
 div.innerHTML = result.replace(/^\s*/,''); //去除模板文本的前导空格(因为它是在<script>标签的下一行)
 mylist.appendChild(div.firstChild);
}

<script type='text/x-handlebars-template' id='list-item'>
 {{#if items}}
 <ul id='mylist'>
  {{#each items}}
   <li><a href='{{url}}'>{{text}}</a></li>
  {{/each}}
 </ul>
 {{/if}}
</script>
funtion addItem(url,text){
 var mylist = document.getElementById('mylist'),
   script = document.getElementById('list-item'),
   template = Handlebars.compile(script.text), //提取模板文本,返回格式化方法
   div = document.createElement('div'),
   result;

 result = template({text:text,url:url});
 div.innerHTML = result;
 mylist.appendChild(div.firstChild);
}
//调用
addItem('/item/4,'First item');