Prevent form submission on Enter key press

Question

I have a form with two text boxes, one select drop down and one radio button. When the enter key is pressed, I want

Answer 1

A much simpler and effective way from my perspective should be :

function onPress_ENTER()
{
        var keyPressed = event.keyCode || event.which;

        //if ENTER is pressed
        if(keyPressed==13)
        {
            alert('enter pressed');
            keyPressed=null;
        }
        else
        {
            return false;
        }
}