/**
 * toggle FAQ Items
 *
 * @param id            the id of the FAQ item to hide or show
 * @param single        true to show only one item at a time, false the open as many as you want
 */
function toggleFaq(id, single, hash) {

        //alert ('Hi!');
        //el = document.getElementById('irfaq_a_'+id+'_'+hash);
        //alert ('Bye!');

        if(single) {
                //show only one Q+A at a time
                toggleAll(false, hash);
                showHideFaq(id, true, hash);
        }
        else {
                //open as many Q+A as you like
                if(document.getElementById('irfaq_a_'+id+'_'+hash).style.display == 'none') {
                        showHideFaq(id, true, hash);
                }
                else {
                        showHideFaq(id, false, hash);
                }
        }
}

/**
 * shows or hides a FAQ item at a time depending on the given status
 *
 * @param id            the id of the FAQ item to hide or show
 * @param status        true to show the item, false to hide it
 */
function showHideFaq(id, status, hash) {
        var faq_id = 'irfaq_a_'+id+'_'+hash; //answer
        var pm_id  = 'irfaq_pm_'+id+'_'+hash; // plus/minus icon

        if(status) {
                document.getElementById(faq_id).style.display = 'inline';
                document.getElementById(pm_id).src = tx_irfaq_pi1_iconMinus;
        }
        else {
                document.getElementById(faq_id).style.display = 'none';
                document.getElementById(pm_id).src = tx_irfaq_pi1_iconPlus;
        }
}

/**
 * shows or hides all FAQ items with one click
 *
 * @param mode  true to show the items, false to hide them
 */
function toggleAll(mode, hash, count) {
        for(i = 0; i < count; i++) {
                showHideFaq(i+1, mode, hash);
        }
}