if (document.getElementById('ask_form')) {
document.getElementById('ask_form').onsubmit = function(e) {
    var expr = document.getElementById('answers_ask_field').value.replace(',','')
    var regex = /^(what( i|')s )?([- \d\.\*\+\/\(\)\^=<>]|\de[\d-]|ln|exp|trunc|floor|ceil|abs|a?(sin|cos|tan)|not|and|or|pi)*$/i;
    if (expr.match(regex)) {
        e.preventDefault();
        location = wgServer + wgArticlePath.replace('$1',expr);
        return false;
    } else { return askQuestion() }
};
}