Get input value from BSP view

Hi

I have created a BSP view, where I show some order numbers in a list.

<ul data-role="listview" data-inset="true" data-theme="c" data-dividertheme="c">
      <li><a href="#overdue" data-transition="flip" data-rel="dialog">
      <%= <ls_open_so>-VBELN %>
      </a></li>
      </ul>

The user must select one of the lines from the list, and then I want to show details from the order.

My question is: How do I get the selected line, and then move it into a SAP field, so I can do a select on behalf of the right order no.?

Thanks,