[Plugin: Event Registration] Error on registration page

When I click to go on the event page a random coding line pops up under the header

action=”http://www.via1.org/register/?” onSubmit=”mySubmit.disabled=true;return validateForm(this)”>

here is the image of the error
http://imageshack.us/photo/my-images/17/46138990.png/

Not sure what it is. I haven’t fiddled around with the editor at all so I don’t know

http://wordpress.org/extend/plugins/event-registration/