function clickclear(thisfield, defaulttext) {
    if (thisfield.value == defaulttext) {
        thisfield.value = "";
    }
}
function clickrecall(thisfield, defaulttext) {
    if (thisfield.value == "") {
        thisfield.value = defaulttext;
    }
}

function showHideAns(id) {

    el = id.split('_');

    if (document.getElementById('answer_' + el[1]).style.display == 'none')
        document.getElementById('answer_' + el[1]).style.display = 'block';
    else
        document.getElementById('answer_' + el[1]).style.display = 'none';

}