function checkMessageLength(objTextarea, idStatus, maxlength){
	maxlength++;
	var message = objTextarea;
	var status = document.getElementById(idStatus);
	var messagelength = message.value.length;
	if ( messagelength >= maxlength ) {
		message.value = message.value.slice(0, maxlength);
	} else {
		status.innerHTML = (maxlength - messagelength - 1)+' tekens resterend';	
	}
	
}