Not allowed to add attribute to <form> tag because it's a reserved name

[julius.holmberg]

Hi. I need to adda a onSublit attribute to one of my tags.
What I need is <form onSubmit="createObject(); return false" >

But I’m not allowed becaus it’s saying that onSubmit is a reserved name.

This guy is having the same issue (link). And I believe that you should just allow us to use this keyword.
Thanks

Here is my site Read-Only: LINK
(how to share your site Read-Only link)