Question

In my webpage (Eg Link1: http://localhost:8086/MyStrutsApp/login.do) I have several links. When a user clicks on one of the links, he is taken to another page (Eg link2: http://localhost:8086/MyStrutsApp/AddBook.jsp) to fill an html form.

Now what I want to achieve is that when any user clicks on the link, that html form (Link2) is displayed on the same page (i.e. Link1).

I have no idea how to achieve this.

Answer 1

The AJAX way to achieve this is the following:

• you have a DIV on your original page that will be replaced (i.e., either has content that only makes sense in the original context or completely empty)
• your Link2 servlet produces only the contents of the above DIV (and not the contents of that page)
• you use a tiny bit of Javascript to make an AJAX call and fill the DIV with the response.

If you want to use Dojo, the HTML page would look like this:

<!-- main content -->
<div id="leftpanel">
    <h3>This content will be replaced</h3>
    You can <a href="#" onClick="updateFromURL('/MyStrutsApp/AddBook.jsp)">add a book</a>
</div>

The Javascript code would look like this:

<script src="http://ajax.googleapis.com/ajax/libs/dojo/1.6/dojo/dojo.xd.js" type="text/javascript"></script>
<script type="text/javascript">
function display_wait(s) {
  var mainPanel=dojo.byId("leftpanel");
  mainPanel.innerHTML='<div class="waitingmsg">'+s+'</div>';
}

function updateFromURL(url) {
    display_wait("loading content");
    dojo.xhrGet({url:url,
                load:function(result) {
                dojo.byId('leftpanel').innerHTML=result;
            }});
}
</script>

(As Rafa mentioned, you can use the same technique to display the new part in a dialog)