How to take current table row textBox value using javascript

 Hi,
  
     i want to take current table row textbox value..
m adding textbox dynamically..

<table>  
<thead>  
<tr>
<td><input style='width:30px;' type='text' name='Name'  id='txtName' class='NameClass'  value=1> 
<img src='\\Store\\Template\\Temp1\\image\\refresh.png' alt='Update'  onclick='ItemUpdate()' title='Update'>
<td class='price'>0.00</td> <td class='total'>0.00  &nbsp;  &nbsp;<a href='#'>
</td>  </tr>      
<tr>
<td><input style='width:30px;' type='text' name='Name'  id='txtName' class='NameClass'  value=1> 
 <img src='\\Store\\ ...