var activeField = null;

function autoJump_onKeyDown(fieldName) {
	var field = document.formulaire.elements[fieldName];
	
	activeField = field;
	field.lastValue = field.value;
}

function autoJump_onKeyUp(fieldName,nextFieldName,maxLength) {
	var field = document.formulaire.elements[fieldName];
	var nextField = document.formulaire.elements[nextFieldName];
	
	if (field == activeField &&	field.value != field.lastValue && field.value.length >= maxLength) {
		nextField.focus();
	}
	
	activeField = null;
}