<select id="type" onchange="findByType()">
<option>活动类型</option>
<s:iterator value="list" var="t">
<option>
<s:property value="#t.type"/>
</option>
</s:iterator>
</select>
js代码:
function findByType(){
document.location.href = "${pageContext.request.contextPath}/activity_findByType.action";
}
后台:String value = ServletActionContext.getRequest().getParameter("type");