var currentlyOpenId;

function toggleVisibility(which) {
	var oldClassName = which.className;
	if (oldClassName.indexOf('ffClosed') != -1) {
		if (currentlyOpenId) {
			toggleVisibility(currentlyOpenId);
		}
		which.className = oldClassName.substring(0,oldClassName.indexOf('ffClosed')) + "ffOpen";
		currentlyOpenId=which;
	} else if (oldClassName.indexOf('ffOpen') != -1) {
		which.className= oldClassName.substring(0,oldClassName.indexOf('ffOpen')) + "ffClosed";
		currentlyOpenId=null;
	}
}

var charCountAlerted = false;
function charCountUpdate(target,counterId,maxChars) {
	if (document.getElementById){
		var charsr = maxChars - target.value.length;
		document.getElementById(counterId).innerHTML = charsr + ' merkkiä jäljellä';
	}
	if(target.value.length > maxChars && charCountAlerted == false) {
		alert('Tekstin maksimipituus ylittynyt.');
		charCountAlerted = true;
	}
	if(target.value.length <= maxChars) charCountAlerted = false;
}