$(document).ready(function(e) {
    // set focus to first visible textfield
    $("input:text:visible:first").focus();
});

// display messages
function message(msg, type, selector) {
    var $msg = $("<div>", {
        className: 'message ' + type
    });
    
    $("<p>", {
        html: msg
    }).appendTo($msg);
    
    if (!selector) {
        selector = 'body';
    }
    
    $(selector).prepend($msg);
}