var focused_field;
function fieldOver(theField) {
	if (focused_field != theField)
		theField.style.backgroundColor = '#d6d6ff';
}
function fieldOut(theField) {
	if (focused_field != theField)
		theField.style.backgroundColor = '';
}
function fieldFocus(theField) {
	theField.style.backgroundColor = '#e3e3ff';
	focused_field = theField;
}
function fieldBlur(theField) {
	theField.style.backgroundColor = '';
	focused_field = ''
}