Ajax Call from a html link

[aarthy]

I have a jsp page named "tvshow.jsp", wherein I am populating the characters
dropdown as and when the TV Show dropdown value changes , by calling the
javascript in the “onchange()” of the select box.
have added a html link, and I want to call the same function from my action
class and I need to populate the character dropdown by clicking the html
link. I am stuck up with this issue.Character dropdown is not populated with
the data from tha action class. Need some help on this please!

<%@ page import="java.util.*"%>
<%@ taglib uri="http://struts.apache.org/tags-html"; prefix="html" %>
<%@ taglib uri="http://struts.apache.org/tags-logic"; prefix="logic" %>
<script language="javascript">
 function retrieveURL(url) {
    if (window.XMLHttpRequest) { // Non-IE browsers
      req = new XMLHttpRequest();
      req.onreadystatechange = processStateChange;
      try {
        req.open("GET", url, true);
        
      } catch (e) {
        alert(e);
      }
      req.send(null);
    } else if (window.ActiveXObject) { // IE
      req = new ActiveXObject("Microsoft.XMLHTTP");
      if (req) {
        req.onreadystatechange = processStateChange;
        req.open("GET", url, true);
        req.send();
          
      }
    }
  }

  function processStateChange() {
    if (req.readyState == 4) { // Complete
      if (req.status == 200) { // OK response
        document.getElementById("characters").innerHTML = req.responseText;
            } else {
        alert("Problem: " + req.statusText);
      }
    }
  }

</script>


<form action="ShowCharacters">
/jsp/tvshow.jsp Click here 

                TV Show:
                <select name="TVShowSelect"
onChange="retrieveURL('ShowCharacters.do?tvShow=' + this.value);">
                <option value="Lissie Maguire"> Lissie Maguire </option>
                        <option value="That’s so Raven"> That’s so Raven 
</option>
                        <option value="Dhoom machale"> Dhoom machale </option>
                </select>
                
                <br>
                Characters: 
        </form> 

ShowCharacters.jsp

<[EMAIL PROTECTED] import="java.util.ArrayList"%>

<%@ taglib uri="http://struts.apache.org/tags-bean"; prefix="bean" %>
<%@ taglib uri="http://struts.apache.org/tags-html"; prefix="html" %>
<%@ taglib uri="http://struts.apache.org/tags-logic"; prefix="logic" %>

<select name="TVShowSelect"> 
<%  ArrayList ch =
(ArrayList)request.getSession().getAttribute("characters"); 
    String[] s = new String[ch.size()]; 
    ch.toArray(s); 
    for (int i = 0; i < s.length; i++) { 
        String name = s[i]; 
%> 
        <option><%=name%></option> 
<%  } 
%> 
</select> 

Thanks
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