loads of times when i press submit/enter whatever i get a box pop up with this in it:

ERROR
A Runtime Error has occured. Do you wish to Debug?
line: 278
error: syntax error
yes no

or

ERROR
A Runtime Error has occured. Do you wish to Debug?
line: 131
error: blocksubmit is undefined
yes no


anyone know what this is all about, i just press no and it goes away but if you press yes it takes you to loads of words???