disable enter key until user inputs a character?

how would you disable the usage of the enter key on a text area until a character is ent开发者_C百科ered?

this is for a form i'm building - purely for aesthetic reasons :-)

a bit like the facebook news feed page where you can't press enter until entering a single character?

many thanks in advance!

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Using jQuery:

$("textarea").live("keydown", function(e){
    if(e.which === 13 && $(this).val() === "")
        e.preventDefault();
});

Note that if your goal is to avoid any new line characters at the top of a textarea, this won't prevent someone from pasting in new lines.

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You would need to add an event handler to listen and trap the return key conditionally. This should point you in the right direction

http://www.webcheatsheet.com/javascript/disable_enter_key.php