jquery阻止事件冒泡及其解决方法

<p id="box"> 
 <a href="javascript:;" class="delete">init html</a>
</p> 
<button id="add">add html</button>

 $(function() {

 // 用click事件
 $(document).click( function(event) {
 console.log('click');
 event.stopPropagation();
 });

 // 用delegate事件
 $(document).delegate('.delete','click', function(event) {
 console.log('delegate');
 event.stopPropagation();
 });

 // 用live事件
 $('.delete').live('click', function(event) {
 console.log('live');
 event.stopPropagation();
 //return false;
 });

 // 新添加的a标签
 $('#add').click(function() {
 var html = '<a href="javascript:;" class="delete">new html 1</a>';
 $('#box').append(html);
 });

 $('#box').click(function() {
 console.log('box emit');
 });

});