function menu(item) {
    if (document.getElementById('menu-'+item).style.visibility == 'hidden' || document.getElementById('menu-'+item).style.visibility == '') {
        document.getElementById('btn-'+item).style.backgroundPosition = '0 -40px';
        document.getElementById('menu-'+item).style.visibility = 'visible';
    } else {
        if (document.getElementById('btn-'+item).className == 'btn') {
            document.getElementById('btn-'+item).style.backgroundPosition = '0 0';
        }
        document.getElementById('menu-'+item).style.visibility = 'hidden';
    }
}

function search() {
    window.open('http://www.google.com/search?q=site:sputnikweazel.co.uk '+document.getElementById('q').value,'search','');
}

function clearField(name,value) {
    if (document.getElementById(name).value == value) {
        document.getElementById(name).value = '';
    }
}

function checkFieldLimit(field,number) {
    if (document.getElementById(field).value.length > number) {
        document.getElementById(field).value = document.getElementById(field).value.slice(0,number);
    }
}

function showPlace(date) {
    document.getElementById('show-'+date).style.visibility = 'visible';
}

function hidePlace(date) {
    document.getElementById('show-'+date).style.visibility = 'hidden';
}