function doAjax(klasse,functie,element,parameters,extend,teller)
{
	var elem = document.getElementById(element);
	if(elem) elem.style.display = 'block';
	var params = '?call='+klasse+'/'+functie+'&'+parameters;
	
	var html = $.ajax({
	  url: "index.php"+params,
	  async: false
	 }).responseText;
	elem.innerHTML = html;

}

function hideDiv(id){	
	var elem = document.getElementById(id);
	if(elem) elem.style.display = 'none';
}

function showDiv(element){
	var elem = document.getElementById(element);
	if(elem) elem.style.display = 'block';	
}

function changeLang(element,value){
	var elem = document.getElementById(element);	
	elem.lang = value;
	hideDiv(element);
}

function emptyInput(element,text){
	var elem = document.getElementById(element);	
	if(elem.value == text){
		elem.value = '';
	}
}