JSF SelectOneRadio onchange event not fired properly in IE7

Hi. I have encountered a problem with JSF SelectOneRadio control where the
onchange event is not fired properly in IE7. (The applicaiton is running on
JBoss Application Server verion 4.0.5). Details as follows :
Using IE7, the following code

<h:selectOneRadio id="myRadioButtons" onchange="javaascript:updateDisplay();">
<f:selectItems ... />
</h:selectOneRadio>

The onchange event will not fire when a radio button is cliccked. It will
only fire if you click on another radio button again (or if you click on the
background of the page).

Note that this does NOT happen with Firefox version 3. I have not tried IE6,
or use selectOneCheckbox or selectOneMenu, but I saw in other forums, the
same thing happens with IE6 and the other selectOneCheckBox and selectOneMenu
controls.

Any solution to this (or service packs available)?

Thanks in advance for answering.

-Andrew