function toggleFaqCatHeadline(obj, hashval) {
    var el = document.getElementById(obj);
    if(el.style.display == 'none') {
        el.style.display = 'block'; 
        document.getElementById('faqCatHeadline' + hashval).style.backgroundImage="url(fileadmin/template/images/pfeil_grau_unten.gif)";
    } else {
        el.style.display = 'none';
        document.getElementById('faqCatHeadline' + hashval).style.backgroundImage="url(fileadmin/template/images/pfeil_grau_rechts.gif)";
    }
}

/*  id: id des HTML-Elements
 *  prop: Name der style-Eigenschaft, z.B. "color"
 */
function getStyle(id, prop) {                      
    var elem = document.getElementById(id); 
    //getComputedStyle klappt bei allen Browsern außer ...
    if (window.getComputedStyle) {
        var valStyle = window.getComputedStyle(elem, null).getPropertyValue(prop);           
    } else if (elem.currentStyle) {
        var valStyle = elem.currentStyle[prop]; 
    }          
    return valStyle;
}


/**
 * 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 tx_irfaq_toggleFaq(id, single, hash) {

    var el = document.getElementById('faqQ_' + id + '_' + hash);
    var txtColor = getStyle('faqQ_' + id + '_' + hash, 'color');
   
    if(txtColor == '#000000' || txtColor == 'rgb(0, 0, 0)') {
        el.style.color = '#d1005d'; 
    } else {
        el.style.color = '#000000';
    }

	if (single) {
		// show only one Q+A at a time
		tx_irfaq_toggleAll(false, hash);
		tx_irfaq_showHideFaq(id, true, hash);
	}
	else {
		// open as many Q+A as you like
		var hidden = (document.getElementById('irfaq_a_'+id+'_'+hash).className == 'tx-irfaq-dynans-hidden');
		tx_irfaq_showHideFaq(id, hidden, 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 show	true to show the item, false to hide it
 */
function tx_irfaq_showHideFaq(id, show, hash) {
	var faq_id = 'irfaq_a_'+id+'_'+hash; //answer
	var pm_id  = 'irfaq_pm_'+id+'_'+hash; // plus/minus icon

	if (show) {
		document.getElementById(faq_id).className = 'tx-irfaq-dynans-visible';
		document.getElementById(pm_id).src = tx_irfaq_pi1_iconMinus;
	}
	else {
		document.getElementById(faq_id).className = 'tx-irfaq-dynans-hidden';
		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 tx_irfaq_toggleAll(mode, hash, count) {
	for (i = 0; i < count; i++) {
		tx_irfaq_showHideFaq(i+1, mode, hash);
	}
}