Struts client side validation is not supporting for image button

[Rajagopal Mani]

Dear All,

Struts client side validation is not supporting for the image button(*1) where as it is working for framework & html buttons(*2). It is not showing the javascript alert message where the field associates with "required" validate rule.

*1
----
This is round codner button which needs to be used as per the requirement.

<div class="buttonwrapper">
<a class="ovalbutton" onclick="clickFind('xxx.do')"><span><bean:message key="button.find"/></span></a>
</div>

*2
----
<html:submit value="Find" onclick="clickFind('xxx.do')" />
<input type="submit" value="Find"onclick="clickFind('xxx.do')" />

How to enable validator rule with image button. Please share if there is any possible resolution.

Thanks