function init() { }

function clearField(field) {
    if (field.value == 'Enter content') {
        field.value = '';
    }
}

function checkField(field) {
    if (field.value == '') {
        field.value = 'Enter content';
    }
}

function confirmSubmit() {
    var agree=confirm("Confirm operation");
    if (agree) {
        return true;
    } else {
        return false;
    }
}