As the follow code, when I listen onMouseOut event on label, it will log message well.
But when I listen onMouseOut event on listheader, it can not show log message.
I just can listen the onMouseOver event.
<zk>
<listbox>
<listhead>
<listheader id="lh" label="header"/>
</listhead>
</listbox>
<label id="lbl" value="label"/>
<div id="log"/>
<script>
<![CDATA[
function mOver(){
jq('$log').text('over');
}
function mOut(){
jq('$log').text('out');
}
zk.afterMount(
function(){
zk.Widget.$('$lh').listen(

{ onMouseOver:mOver ,onMouseOut:mOut }

);
zk.Widget.$('$lbl').listen(

{ onMouseOver:mOver ,onMouseOut:mOut }

);
}
);
]]>
</script>
</zk>