function chProv(state){
  for(i=1;i<13;i++){
    document.getElementById('p'+i).checked = state;
  }
}
function aanvragen(){
	document.forms[0].submit();
}

function favorieten(site){

	var bookmarkurl = "http://www."+site;
	var bookmarktitel = site;
	if(document.all){
		window.external.AddFavorite(bookmarkurl,bookmarktitel);
	}
}