var whitespace = " \t\n\r";
function isEmail (s){
   if (isEmpty(s)) 
       if (isEmail.arguments.length == 1) return false;
       else return (isEmail.arguments[1] == true);
    if (isWhitespace(s)) return false;
    var i = 1;
    var sLength = s.length;
    while ((i < sLength) && (s.charAt(i) != "@"))
    { i++
    }

    if ((i >= sLength) || (s.charAt(i) != "@")) return false;
    else i += 2;
    while ((i < sLength) && (s.charAt(i) != "."))
    { i++
    }
    if ((i >= sLength - 1) || (s.charAt(i) != ".")) return false;
    else return true;
}
function isEmpty(s){ 
  return ((s == null) || (s.length == 0))
}
function isWhitespace (s){
  var i;
    if (isEmpty(s)) return true;
    for (i = 0; i < s.length; i++)
    { 
        var c = s.charAt(i);

        if (whitespace.indexOf(c) == -1) return false;
    }
    return true;
}
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;
	
	return result;
}