for (var i=0;i<=howmany;i++){
	shown[i] = false;
}

function blocking(i){
//shown display, img, color true/false
shown[i] = (shown[i]) ? false : true;
current = (shown[i]) ? 'block' : 'none';
active = (shown[i]) ? 'url(/images/zoekres_on.gif)' : 'url(/images/zoekres_off.gif)';
	//display open/dicht
	document.getElementById('item'+i).style.display = current;
	//document.getElementById('listitem'+i).style.backgroundImage =active;
	//document.getElementById('listitem'+i).style.backgroundColor = '#ECF1F6';
}
//klap alle divs op de pagina open
function showall(intStart, intHowmany) {
	for (var i=intStart;i<intStart + intHowmany;i++){
		if (document.getElementById('item' + i)) {
			document.getElementById('item'+i).style.display = 'block';
			//document.getElementById('listitem'+i).style.backgroundImage ='url(/images/zoekres_on.gif)';
			current = (shown[i]) = 'block';
			shown[i] = (shown[i]) = true;
		}
	}
}

//klap alle divs op de pagina dicht
function hideall(intStart, intHowmany) {
	for (var i=intStart;i< intStart + intHowmany;i++) {
		if (document.getElementById('item' + i)) {
			document.getElementById('item'+i).style.display = 'none';
			//document.getElementById('listitem'+i).style.backgroundImage ='url(/images/zoekres_off.gif)';
			current = (shown[i]) = 'none';
			shown[i] = (shown[i]) = false;
		}
	}
}