Im using seam 2.0.0
I have a <s:fileUpload> and my application should accept only "image/png, image/jpg" files.
I used the <s:fileUpload> like this
<s:fileUpload accept="image/png, image/jpg" data="#{TPZBackgroundUploadAction.byteArray}" fileName="#{TPZBackgroundUploadAction.fileName}"/>
I don't know of any browser that honours the accept attribute.