function checkField(id) {
    try {
        field = getElement(id)
    } catch(e) {
        return true
    }
    if(field.value.replace(/[\s\n]/,'').length > 3) {
        field.style.backgroundColor="white"
        return true
    } else {
        field.style.backgroundColor="#FFFFDD"
        return false
    }
}
function checkForm(form) {
    requiredFields = form.required.value.split(',')
    if(filter(checkField, requiredFields).length == requiredFields.length) {
        return true
    }
    return false
}