[js]Check that either 1 of two fields is populated before submit

[Paul Ferrie]

I have 2 fields in a form
email,
phone number,
I need to check wether either field is populated before i can allow submit.

how do i do that?

Cheers
Paul

[Cota]

A simple way is to say, if textbox NOT equal to nothing...

if (textbox.text != "") {
//do stuff
}