OnMouseOver screen flicker

Hello.

I have the following vbscript on a web page. On some client pc's, the
divMsg will flicker when this particular routine is called. Is there
a better way to do this?

Thanks

<SCRIPT LANGUAGE="VBScript">
sub selApp_onmouseover()
divMsg.style.visibility = "visible"
end sub

sub selApp_onmouseout()
divMsg.style.visibility = "hidden"
end sub
</script>