function hideDivs() {
    for (var i = 0; i <= cats.length - 1; i++) {
        hideDiv(cats[i]);
    }
}
function hideDiv(id) {
    //alert(id);
    if (document.getElementById) {
        document.getElementById(id).style.display = 'none';
    }
}

function toggleCategories(catId) {
    //----- categories array set at the page so category id's can change
    var cat = document.getElementById(catId);
    var i = 0;
    if (cat.style.display == 'block') {
        hideDivs();
        cat.style.display = 'none';
    } else {
        hideDivs();
        cat.style.display = 'block';
    }
}

function toggleBlock(elementId, imgId) {
    var element = document.getElementById(elementId);
    var imgObj = document.getElementById(imgId);

    if (element.style.display == 'block') {
        element.style.display = 'none';
        imgObj.src = '/Images/faqTwisty.png';
    } else {
        element.style.display = 'block';
        imgObj.src = '/Images/faqTwistyCollapse.png';
    }
}