[jQuery] Validate Plugin - Charcode Warning in Firebug

[jQuery] Validate Plugin - Charcode Warning in Firebug


I'm using the jQuery Validate plugin.
I have a basic form that asks for someone's name:
<input type='text' name='gsFname' class='required ' class='prompt'
size='18' maxlength='50'>
When I enter the first character into the field, I get a Firebug
warning:
"The 'charCode' property of a keyup event should not be used. The
value is meaningless."
Is there a way to fix this?