function activateElement(element, defCaption) {
    if (element.value == defCaption) {
        element.value = '';
    }
    var newClassName = element.className;
    newClassName = newClassName.replace(' inactive', ' active');
    element.className = newClassName;
}

function deactivateElement(element, defCaption) {
    if (element.value == '') {
        element.value = defCaption;
        var newClassName = element.className;
        newClassName = newClassName.replace(' active', ' inactive');
        element.className = newClassName;
    }
}