function showCat(DivID) {

    var thisBlock = document.getElementById(DivID);
    if (thisBlock.style.display == "none") {
        thisBlock.style.display = "block";
      }
    else {
        thisBlock.style.display = "none";
    }

}


function showCatLink(DivID) {
    var thisBlock = document.getElementById(DivID);
    thisBlock.style.backgroundImage = "url('/images/buttons/sidenav_orange.jpg')";
}

function hideCat(DivID) {
    var thisBlock = document.getElementById(DivID);
    thisBlock.style.display = "none";
}