// JavaScript Document
function CheckForm( theform ) {
	
	var bMissingFields = false;
	var strFields = "";
	
	if( theform.naam.value == '' ){
		bMissingFields = true;
		strFields += "     naam\n";
	}
	
	if( theform.email.value == '' ){
		bMissingFields = true;
		strFields += "     email\n";
	}
	if( theform.email.value != '' ){
		var pos1 = theform.email.value.indexOf("@", 0);
		var pos2 = theform.email.value.indexOf(".", 0);
		if (pos1 <= 0 || pos2 <= 0) {
			bMissingFields = true;
		 	strFields += "     email\n";
		}
	}
	
	if( theform.telefoon.value == '' ){
		bMissingFields = true;
		strFields += "     telefoon\n";
	}
	
	if( bMissingFields ) {
		alert( "Er onbreekt informatie, de volgende velden zijn niet (of niet volledig) ingevuld:\n" + strFields );
		return false;
	} 
	
	return true;
}