function setHelptekst(visible, id) {
		var displaystyle = (visible)? "block": "none";

		allDiv = document.getElementsByTagName("div");
		for (n= 0; n < allDiv.length; n++) {
			if (allDiv[n].className == "helptekst" &&allDiv[n].id != id ) {
				allDiv[n].style.display="none";
			} 
		}	
		
		if (id != ""){
			if (document.getElementById(id).style.display == displaystyle){
				displaystyle = "none";
			}
			document.getElementById(id).style.display = displaystyle;
		}	
	}

	function getalNaarTekst(nr){
		switch(nr){
			case 1:
				return "eerste";
			case 2:
				return "tweede";
			case 3:
				return "derde";
			case 4:
				return "vierde";
			case 5:
				return "vijfde";
			case 6:
				return "zesde";
			case 7:
				return "zevende";
			case 8:
				return "achtste";
			case 9:
				return "negende";
			default:
				return "";
		}
	}