function eraseFormBg( id ) {
	target = document.getElementById( id );
	target.style.backgroundImage = 'none';
}

function restoreFormBg( id, path ) {
	target = document.getElementById( id );
	if ( target && ( target.innerHTML == '' && target.value == '' ) ) {
		target.style.backgroundImage = 'url(' + path + ')';
		target.style.backgroundRepeat = 'no-repeat';
	}
}