action called twice in IE 8 when using different ajax submit for the same form

[will zhang]

Here is the form from my jsp page:

<s:url id="email" action="contract_emailContract" />
<s:url id="release" action="release_releaseContract" />

<s:form name="theForm"  id="emailpdf">
    <s:textarea  name="emailTo" 		label="To" 				rows="3" cols="49" readonly="true" />
    <s:submit  value="Release" formId="emailpdf" href="%{release}" theme="ajax" targets="comment_result" showLoadingText="false" indicator="loadingImage"/>
    <s:submit value="Send e-mail" formId="emailpdf" href="%{email}" theme="ajax" targets="email_result" showLoadingText="false" indicator="loadingImage"/>
</s:form>	
    

When using firefox, it works fine. When using internet explorer, the form is submitted twice for the same action.
Example: if the user clicks "Release", public String releaseContract() will be executed twice.

I saw other's form was submitted twice mostly likely because of Javascript, but obviously this case is different.

Thanks!