// Elemente ein- oder ausblenden

function toggleClass(class_name1,class_name2,el) {

    if (el.className == class_name1) {
    
        el.className = class_name2;
        
    }   else {
                el.className = class_name1;
        }

}

function setDisplayProp(value,id) {
	el = document.getElementById(id);
	el.style.display = value; 
}

function toggleDisplay(id, obj){
	el = document.getElementById(id);
	if( el ){
		
		if( obj.checked ){
			el.style.display = '';
		} else {
			el.style.display = 'none';
		}		
	}
}

function institution_required(required)
{
	if(required)
	{
		document.getElementById('institution').innerHTML = '*';
	}
	else
	{
		document.getElementById('institution').innerHTML = '';
	}
		
}