buttons do not work in netscape4.7

I am implementing a struts-based web application. With this jsp page, buttons work perfectly in IE and Netscape7.0, but these buttons(add and save)do not work at all in Netscape4.7. Could anyone give me a hand? Thanks very much.
Here is the jsp code:
<%-- code start --%>
<%@ page language="java" %>
<%@ taglib uri="/WEB-INF/struts.tld" prefix="struts" %>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>

<html>
<head>
<title>Test</title>
</head>
<script language="Javascript">
function submitPage(button){
if (button=='add') {
document.forms[0].action = "../jsp/page1.do?task=add";
document.forms[0].submit();
}
if (button=='save') {
document.forms[0].action = "../jsp/page1.do?task=save";
document.forms[0].submit();
}
}
</script>
<body bgcolor="#FFFFFF" text="#000000" leftmargin="0" topmargin="0" marginwidth="0" marginheight="0">
<table width="100%" border="0" cellspacing="0" cellpadding="0">

<html:form action="/jsp/test.do?task=get" name="testForm" type="formbeans.TestForm" scope="session">

<tr>
<td colspan="4"> </td>
</tr>

</html:form>
<tr>
<td colspan="4"> </td>
</tr>
<tr>
<td colspan="3">
<%--THE ADD BUTTON--%>
<html:link href="javascript:submitPage('add')"><html:img srcKey="imgRecSetNav.btnAdd.src" border="0"/></html:link>
<%--THE SAVE BUTTON--%>
<html:link href="javascript:submitPage('save')"><html:img srcKey="imgModFunct.btnSave.src" border="0"/></html:link>

</td>
<td width="19%"> </td>
</tr>

<tr>
<td colspan="4"> </td>
</tr>
</table>
</body>
</html>
<%-- code end --%>
Thanks again,
Nora

No one interested in? Any suggestion, comments? Anything is appreciated.

The problem was solved! It is because the formbean is empty which has no property inside. We keep the empty formbean to make structure consistent. The Netscape4.7 does not like the empty formbean, then stopping submit the form. Just let you know the result in case you have interested in it.
Nora.