/**
   * DHTML date validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
   */
  // Declaring valid date character, minimum year and maximum year
  var dtCh = "-";
  var minYear = 2007;
//  var maxYear = <% = (Year(date) + 1) %>;    // to be written in the asp page
  var maxYear = 2011;   // patch, for now

  function isInteger(s)
  {
    var i;
    for (i = 0; i < s.length; i++)
    {
      // Check that current character is number.
      var c = s.charAt(i);
      if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
  }

  function stripCharsInBag(s, bag)
  {
    var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++)
    {
      var c = s.charAt(i);
      if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
  }

  function daysInFebruary (year)
  {
    // February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28);
  }

  function DaysArray(n)
  {
    for (var i = 1; i <= n; i++)
    {
      this[i] = 31
      if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
      if (i==2) {this[i] = 29}
    }
    return this
  }

  function isDate(dtStr)
  {
    if (dtStr.length != 10)
    {
      alert("La date doit suivre le format aaaa-mm-jj")
      return false
    }

    var daysInMonth = DaysArray(12);
    var pos1 = dtStr.indexOf(dtCh);
    var pos2 = dtStr.indexOf(dtCh, pos1+1)

    // extraire la date selon la notation française
    var strYear = dtStr.substring(0, pos1)
    var strMonth = dtStr.substring(pos1+1, pos2)
    var strDay = dtStr.substring(pos2+1)

    strYr = strYear
    if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
    if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
    for (var i = 1; i <= 3; i++)
    {
      if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
    }
    month = parseInt(strMonth)
    day = parseInt(strDay)
    year = parseInt(strYr)

    if (pos1==-1 || pos2==-1)
    {
      alert("La date doit suivre le format aaaa-mm-jj")
      return false
    }

    if (strMonth.length<1 || month<1 || month>12)
    {
      alert("Veuillez entrer une valeur valide pour le mois.")
      return false
    }

    if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month])
    {
      alert("Veuillez entrer une valeur valide pour le jour.")
      return false
    }

    if (strYear.length != 4 || year==0 || year<minYear || year>maxYear)
    {
      alert("Veuillez entrer une valeur valide pour l'année (entre " + minYear + " et " + maxYear + ").")
      return false
    }

    if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false)
    {
      alert("Veuillez entrer une date valide.")
      return false
    }

    return true
  }

  function validateDate(dateObj)
  {
    if (isDate(dateObj.value)==false)
    {
      dateObj.focus()
      return false
    }
    return true
  }