function toggleVisible(source) {
    if(document.getElementById(source).style.display == "block") document.getElementById(source).style.display = "none";
    else document.getElementById(source).style.display = "block"
}

function toggleFilter() {
    if(document.getElementById("filterContent").style.display == "block") document.getElementById("filterContent").style.display = "none";
    else document.getElementById("filterContent").style.display = "block"
}