SimpleTagsSelector is a jquery plugin which bundle tags action with textbox
<input name="item[tags]" id="item_tags" /><br/>
<ul id="tags">
<li><a class="tag" href="#">PC</a></li>
<li><a class="tag" href="#">Laptop</a></li>
<li><a class="tag" href="#">IPad<a></li>
</ul>
$(document).ready(function(){
$('#item_tags').bind_taglist({'list':'#tags'});
});