function toggleElementDisplay(id) {
	var el = $get(id);
	if ( el.style.display != 'none' ) {
		el.style.display = 'none';
	}
	else {
		el.style.display = '';
	}
}

function toggleMehr(hplID, hplMehrText, hplWenigerText, imgID, imgMehrUrl, imgWenigerUrl)
{
    var hpl = $get(hplID);
    var img = $get(imgID);
    if (hpl.innerHTML == hplMehrText) {
         hpl.innerHTML = hplWenigerText;
         img.src = imgWenigerUrl;
    } else {
        hpl.innerHTML = hplMehrText;
        img.src = imgMehrUrl;
    }
}