title: How to change url of back button in grid form in admin of magento?
body: <p>I am working Magento community edition 1.7 version.</p>
  
  <p>I have a grid in admin panel.
  Now when I click on this URL it open a form with two tabs in left sidebar.
  When I click on second tab it show a grid in its right side.</p>
  
  <p>Then I click on a row of this grid it opens a form on another page. 
  In this form there is back button.</p>
  
  <p>How can I change its URL to previous page?</p>