$.fn.interceptEnter = function(button_selector) {
    var checkForEnter = function(event) {
        if (event.keyCode == 13) {
            $(button_selector).click();
            event.preventDefault();
            return false;
        }
    };

    if ($.browser.mozilla) {
        $(this).keypress(checkForEnter);
    } else {
        $(this).keypress(checkForEnter);
    }
};