var items = new Array();


function toggle(item) {

	//if item is not yet in array add array item
	if(!inArray(items,item)){
		items.splice(1,0,item);
		}

	//toggle specified item
	if (!document.getElementById(item).style.display) {
		document.getElementById(item).style.display = 'block';
		} else {
		document.getElementById(item).style.display = '';
		}

	//set all other items' display property to none
	for(i=0;i<items.length;i++) {
		if(items[i]!=item) {
			document.getElementById(items[i]).style.display = '';
			}
		}

	}


function inArray(arr,str){
	for (var i=0;i<arr.length;i++){
		if (arr[i]==str) return true;
		}
	return false;
	}