SO - 14116471

HTML

<script src="http://www.examplet.buss.hk/js/jquery.table.addrow.js"></script>
<script src="http://www.examplet.buss.hk/js/jquery.defaultText.js"></script>
<table border="0"> 
<tr> 
 <td><input type="file" name="image[]" value=""/></td>  
 <td><a class="delRow" href="javascript:void(0)">delete</a></td> 
</tr> 
<tr> 
 <td colspan="2">
 <a class="addRow" href="javascript:void(0)" id="1">add</a>  
 </td> 
</tr> 
</table>

JavaScript

$(".addRow").btnAddRow(function(obj){
    $(obj).find("input[type='file']").val('');
});   
$(".delRow").btnDelRow();