function getObj(objID)
	{
	    if (document.getElementById) {return document.getElementById(objID);}
	    else if (document.all) {return document.all[objID];}
	    else if (document.layers) {return document.layers[objID];}
	}	

	function checkOfferte(){
		var email = getObj('E-mail').value;
		var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
		if ((filter.test(email)) && (getObj('Naam').value != '') && (getObj('Voornaam').value != '')){
			return true;
		} else {
			alert("Verplicht veld niet (juist) ingevuld.");
			return false;
		}
	}