function verif_date(input){
	var regex = new RegExp("[/-]");
	var date = input.split(regex);
	var nbJours = new Array('',31,28,31,30,31,30,31,31,30,31,30,31);
	var result = true;
	if ( date['2']%4 == 0 && date['2']%100 > 0 || date['2']%400 == 0 ) nbJours['2'] = 29;
	if( isNaN(date['2']) )	result=false;
	if ( isNaN(date['1']) || date['1'] > 12 || date['1'] < 1 ) result=false;
	if ( isNaN(date['0']) || date['0'] > nbJours[Math.round(date['1'])] || date['0'] < 1 ) result=false;
	if(!result) return false;
	else return date['2']+'-'+date['1']+'-'+date[0]; // retourne la date au format mysql
}