Lost UN/PW Send Button

Hi,
Been getting emails that the Lost UN/PW Send Button is greyed out.

Looking at it I noticed that it is disabled and is only enabled on keyup

$('#checkusername,#checkemail').keyup.....

So it seems if the users un/PW is cached and does not have to be entered then the button is greyed out.

Is there a better way of doing this?

The jQuery needs a keyup response, which may not happen depending on how auto-complete is being done. They just need to type something for it to take affect or have a browser that's properly firing the events. What browser specifically is this happening on? Using LastPass for example fires the necessary events so this is likely a browser problem.