/**
 * @author Mathieu Mérineau
 */
function addition() {
	var total=0;
	total=parseInt(document.getElementById('f_next').value)-1;
	document.getElementById('f_last_end').value=total;
} 
	
function addition2() {
	var total=0;
	total=parseInt(document.getElementById('f_end').value)-1;
	document.getElementById('f_next_end').value=total;
}