// Declaring valid date character, minimum year and maximum year
var dtCh= "/";
var minYear=1900;
var maxYear=2100;

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
}

// converted from us version
function isDate(dtStr)
{
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strDay=dtStr.substring(0,pos1)
	var strMonth=dtStr.substring(pos1+1,pos2)
	var strYear=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)
	}
	day=parseInt(strDay)
	month=parseInt(strMonth)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){
		alert("The date format should be : dd/mm/yyyy")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Please enter a valid month")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Please enter a valid day")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date")
		return false
	}
return true
}


var msgNumber  = "must be a number";
var msgEMail   = "must be an e-mail address";
var msgURL     = "must be a web address";
var msgDate    = "must be a date";
var msgFillOut = "Please fill out";
var msgNoForm  = "Form does not exist";
var msgNoField = "Field does not exist";

//--------------------------------------------------------------------------------------------------------
// Functions
//--------------------------------------------------------------------------------------------------------

function _trim(str) {
  if(str) {
    str = str.replace(/^\s+/, "");
    str = str.replace(/\s+$/, "");
  }
  return str;
}

function _isDate(year, month, day) {
  month--;
  if(year < 100) year += 2000;
  var d = new Date(year, month, day);
  return ((day == d.getDate()) && (month == d.getMonth()) && (year == d.getFullYear()));
}

function checkForm() {
  var args = checkForm.arguments;
  var f = args[0];
  var msg = "";
  var arr, field, title, type, minLength, elem, val, cnt, nr, i, j;
  var format, d, day, month, year;

  var valid_url = /^(https?|ftp):\/\/([a-z0-9._-]+:[a-z0-9._-]+@)?[a-z0-9äöüÄÖÜ#._\/~% -]+(\?([a-z0-9_-]+(=[a-zA-Z0-99äöüÄÖÜß+%?_-]+&?)?)*)?$/i;
  var valid_mail = /^[a-z0-9._-]+@[a-z0-9äöüÄÖÜ.-]+\.[a-z]{2,4}$/i;

  if(document.forms[f]) {
    for(i = 1; i < args.length; i++) {
      arr = args[i].split(":");
      field = _trim(arr[0]);
      title = _trim(arr[1]);
      if(!title) title = field;
      type = _trim(arr[2].toLowerCase());
      minLength = _trim(arr[3]);
      elem = document.forms[f].elements[field];

      if(elem) {
        val = _trim(elem.value);

        if(val != "") {
          if(type == "number") {
            val = val.replace(",", ".");
            if(isNaN(val)) msg += '"' + title + '" ' + msgNumber + "\n";
          }
          else if(type == "mail" && val.search(valid_mail) == -1) msg += '"' + title + '" ' + msgEMail + "\n";
          else if(type == "url" && val.search(valid_url) == -1) msg += '"' + title + '" ' + msgURL + "\n";
          else if(type.indexOf("date") != -1) {
            if(type.indexOf("(") != -1) format = type.substr(type.indexOf("("));
            else format = "(dmy)";
            d = val;

            for(j = 1; j < format.length - 1; j++) {
              cnt = d.search(/[^0-9]/);
              if(cnt == -1) cnt = d.length;

              nr = d.substr(0, cnt);
              nr = parseInt(nr.replace(/^0/, ''));

              switch(format.charAt(j)) {
                case "d": day = nr; d = d.substr(cnt + 1); break;
                case "m": month = nr; d = d.substr(cnt + 1); break;
                case "y": year = nr; d = d.substr(cnt + 1); break;
              }
            }
            if(!_isDate(year, month, day)) msg += '"' + title + '" ' + msgDate + "\n";
          }
        }

        if(minLength) {
          if(elem.length) {
            if(elem.options) {
              for(j = cnt = 0; j < elem.options.length; j++) {
                if(elem.options[j].selected && elem.options[j].value != "") cnt++;
              }
            }
            else for(j = cnt = 0; j < elem.length; j++) {
              if(elem[j].checked) cnt++;
            }
          }
          else if(elem.type == "checkbox") cnt = elem.checked ? 1 : 0;
          else cnt = val.length;
          if(cnt < minLength) msg += msgFillOut + ' "' + title + '"\n';
        }
      }
      else msg += msgNoField + ': "' + field + '"\n';
    }

    if(msg) alert(msg);
    else document.forms[f].submit();
  }
  else alert(msgNoForm + ': "' + f + '"');
}

function IsValidTime(timeStr) 
{
// Checks if time is in HH:MM:SS AM/PM format.
// The seconds and AM/PM are optional.

	var timePat = /^(\d{1,2}):(\d{2})(:(\d{2}))?(\s?(AM|am|PM|pm))?$/;

	var matchArray = timeStr.match(timePat);
	if (matchArray == null) 
	{
		alert("Time is not in a valid format.");
		return false;
	}

	hour = 	matchArray[1];
	minute = matchArray[2];
	second = matchArray[4];
	ampm = matchArray[6];

	if (second=="") { second = null; }
	if (ampm=="") { ampm = null }

	if (hour < 0  || hour > 23) 
	{
		alert("Hour must be between 1 and 12. (or 0 and 23 for military time)");
		return false;
	}
	if (hour <= 12 && ampm == null) 
	{
		if (confirm("Please indicate which time format you are using.  OK = Standard Time, CANCEL = Military Time")) 
		{
			alert("You must specify AM or PM.");
			return false;
   		}
	}
	if  (hour > 12 && ampm != null) 
	{
		alert("You can't specify AM or PM for military time.");
		return false;
	}
	if (minute<0 || minute > 59) 
	{
		alert ("Minute must be between 0 and 59.");
		return false;
	}
	if (second != null && (second < 0 || second > 59)) 
	{
		alert ("Second must be between 0 and 59.");
		return false;
	}
	return false;
}
//--------------------------------------------------------------------------------------------------------


/**********************************************************
* Name:		doNothing()
* Description:	empty placeholder
**********************************************************/
function doNothing()
{
	;
}

/**********************************************************
* Name:		txtStartDate_onKeyPress()
* Description:	IE event that only allows valid chars to 
*				be typed in date textboxes
**********************************************************/
function txtDate_onKeypress()
{
	var string="1234567890/";
	if (string.indexOf(unescape('%' + window.event.keyCode.toString(16))) != -1) 
		window.event.returnValue = true;
	else
		window.event.returnValue = false;
}

/**********************************************************
 * Name:		StartDate_Change()
 * Description:	Callback for popup calendar, changes the 
 *				start date
 **********************************************************/
function Date_Change(sNewValue,sField)
{
	document.form1[sField].value = sNewValue;
}

function openCalendar(sDate,sCallback,sCallbackField,nTop,nLeft)
{
	var oWindow;
	oWindow = window.open("popupcalendar.asp?date=" + sDate + "&callback=" + sCallback + "" + "&callbackfield=" + sCallbackField + "","calendar","top=" + nTop + ",left=" + nLeft + ",height=180,width=160,status=no,resizable=no,toolbar=no,menubar=no,scrollbars=no,location=no");
	oWindow.focus();
	return true;
}
//stop hiding-->

// JavaScript Document
/**
 * DHTML date validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */
// Declaring valid date character, minimum year and maximum year
function compareDates(date1,date2)
{
var d1 = date1
var d2 = date2
//alert ("d1="+d1+" d2="+d2);

//var arrDate1 = d1.value.split("/");
//var arrDate2 = d2.value.split("/");

new Date(d1.replace(/(..).(..).(....)/, "$3/$2/$1")) 
new Date(d2.replace(/(..).(..).(....)/, "$3/$2/$1")) 

//var useDate1 = new Date(arrDate1[2], arrDate1[1]-1, arrDate1[0]);
//var useDate2 = new Date(arrDate2[2], arrDate2[1]-1, arrDate2[0]);

if (d2 > d1)
{
	return true;
}
return false;

}

function popup(url) {
	newWindow = window.open(url,'daughter','menubar=no,toolbar=no,location=no,scrollbars=yes,resizable=no,width=500,height=450,screenX=50,screenY=50,top=50,left=50');
	newWindow.focus();
}