title: populate textfield on selecting dropdown struts2
body: <p>I have a text <code>&lt;s:select&gt;</code> in my jsp page .</p>
  
  <p>Now what i have to do is when someone selects a value from this dropdown ,
  i need to call my action class to get some value based on dropdown selection.</p>
  
  <p>Now this value (which i got from my actionclass) should be shown in the <code>&lt;s:textfield&gt;</code> below this dropdown .</p>
  
  <p>Please help !!</p>