Form is not submitted on pressing Enter key but submiited onclicking submit button

Question

This may be silly but i really want to know about this, not only me this may be question a from thousands of students.

The following link is my university website LINK

there is a login panel. after entering my username & password if i click enter then page reloads but the expected behaviour is to submit the form.
To actually login into this website you need to click on submit button.

Can anyone explain me about this.

• what i think is there must be some onlick event on sumit button but the button there is
  <input type="submit"> so by default it need to submit by pressing enter as usally happens in all websites
• I also noticed one more thing that the form tag is missing there.

Any help or explanation about this question is appreciated

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EDIT
just enter a wrong email and password

1. if u press enter: there is no red color error message of wrong email and password

2. if u click submit:there is a red color error message of wrong email and password

Answer 1

The default behaviour is that when input with type submit is present in the form, the form will get sumitted upon click on the button, or enter key press when some form control has focus. Since controls on your site are not inside of form the expected behaviour will not be seen.