ajax jsp tag problem (formupdate.view ?)

<div style="width: 400px;">
<form id="form1" action="formupdate.view">
<fieldset><legend>Velocity Conversion</legend>
<p>Enter miles per hour and click Calculate</p>

<label for="mph">Miles/Hour (mph)</label> <input type="text" id="mph" name="mph" />
<input type="submit" value="Calculate" />
</fieldset>
</form>
</div>

<div id="successMsg" style="border: 1px solid #0e0; background-color: #efe; padding: 2px; margin-top: 8px; font: normal 12px Arial; color: #090">Calculation results</div>

<ajax:submit source="form1" target="successMsg" />



i'd like to know what kind of code in in formupdate.view? is it java, javascript or xml?

i want to display results from my database with this tag below:

<ajax:displayTag id="displayTagFrame">

<display:table name="service.allCars" class="displaytag" pagesize="10" scope="page"
defaultsort="1" defaultorder="descending" export="true" id="row" excludedParams="ajax">
<display:column property="make" title="Make" sortable="true" headerClass="sortable" />
<display:column property="model" title="Model" sortable="true" headerClass="sortable" />
<display:column title="Link" media="html">
<a href="http://www.${row.make}.com">${row.make} Web Page</a>
</display:column>
<display:column title="Link" media="excel xml">
www.${row.make}.com
</display:column>
</display:table>

</ajax:displayTag>

but i dont know how to display database result with this tag.. im used to use for:each tag.. i did it by storing database results to bean then requestDispatcher to new page which has for:each tag that used to display the result.
How do i display the result from beans with <ajax:displayTag>?