/**
 * 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=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
}

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

/*
* From Code Project
*/

function validatetime(strval)
{
  var strval1;
    
  //minimum lenght is 6. example 1:2 AM

  if(strval.length < 6)
  {
   //alert("Invalid time. Time format should be HH:MM AM/PM.");
   //return false;
   return 'Invalid time. Time format should be HH:MM AM/PM.';
  }
  
  //Maximum length is 8. example 10:45 AM

  if(strval.lenght > 8)
  {
   //alert("invalid time. Time format should be HH:MM AM/PM.");
   //return false;
   return 'Invalid time. Time format should be HH:MM AM/PM.';
  }
  
  //Removing all space

  strval = trimAllSpace(strval); 
  
  //Checking AM/PM

  if(strval.charAt(strval.length - 1) != "M" && strval.charAt(
      strval.length - 1) != "m")
  {
   //alert("Invalid time. Time shoule be end with AM or PM.");
   //return false;
   return 'Invalid time. Time shoule be end with AM or PM.';
  }
  else if(strval.charAt(strval.length - 2) != 'A' && strval.charAt(
      strval.length - 2) != 'a' && strval.charAt(
      strval.length - 2) != 'p' && strval.charAt(strval.length - 2) != 'P')
  {
   //alert("Invalid time. Time shoule be end with AM or PM.");
   //return false;
   return 'Invalid time. Time shoule be end with AM or PM.';
  }
  
  //Give one space before AM/PM

  
  strval1 =  strval.substring(0,strval.length - 2);
  strval1 = strval1 + ' ' + strval.substring(strval.length - 2,strval.length)
  
  strval = strval1;
      
  var pos1 = strval.indexOf(':');
  document.Form1.TextBox1.value = strval;
  
  if(pos1 < 0 )
  {
   //alert("invlalid time. A color(:) is missing between hour and minute.");
   //return false;
   return 'Invlalid time. A color(:) is missing between hour and minute.';
  }
  else if(pos1 > 2 || pos1 < 1)
  {
   //alert("invalid time. Time format should be HH:MM AM/PM.");
   //return false;
   return 'Invalid time. Time format should be HH:MM AM/PM.';
  }
  
  //Checking hours

  var horval =  trimString(strval.substring(0,pos1));
   
  if(horval == -100)
  {
   //alert("Invalid time. Hour should contain only integer value (0-11).");
   //return false;
   return 'Invalid time. Hour should contain only integer value (0-11).';
  }
      
  if(horval > 12)
  {
   //alert("invalid time. Hour can not be greater that 12.");
   //return false;
   return 'Invalid time. Hour can not be greater that 12.';
  }
  else if(horval < 0)
  {
   //alert("Invalid time. Hour can not be hours less than 0.");
   //return false;
   return 'Invalid time. Hour can not be hours less than 0.';
  }
  //Completes checking hours.

  
  //Checking minutes.

  var minval =  trimString(strval.substring(pos1+1,pos1 + 3));
  
  if(minval == -100)
  {
   //alert("Invalid time. Minute should have only integer value (0-59).");
   //return false;
   return 'Invalid time. Minute should have only integer value (0-59).';
  }
    
  if(minval > 59)
  {
     //alert("Invalid time. Minute can not be more than 59.");
     //return false;
	 return 'Invalid time. Minute can not be more than 59.';
  }   
  else if(minval < 0)
  {
   //alert("Invalid time. Minute can not be less than 0.");
   //return false;
   return 'Invalid time. Minute can not be less than 0.';
  }
   
  //Checking minutes completed.  
  
  //Checking one space after the mintues 

  minpos = pos1 + minval.length + 1;
  if(strval.charAt(minpos) != ' ')
  {
   //alert("Invalid time. Space missing after minute. Time should have HH:MM AM/PM format.");
   //return false;
   return 'Invalid time. Space missing after minute. Time should have HH:MM AM/PM format.';
  }
     
  return '';  
}

function trimAllSpace(str) 
{ 
    var str1 = ''; 
    var i = 0; 
    while(i != str.length) 
    { 
        if(str.charAt(i) != ' ') 
            str1 = str1 + str.charAt(i); i ++; 
    } 
    return str1; 
}

function trimString(str) 
{ 
     var str1 = ''; 
     var i = 0; 
     while ( i != str.length) 
     { 
         if(str.charAt(i) != ' ') str1 = str1 + str.charAt(i); i++; 
     }
     var retval = IsNumeric(str1); 
     if(retval == false) 
         return -100; 
     else 
         return str1; 
}

function IsNumeric(strString) 
{ 
    var strValidChars = "0123456789"; 
    var strChar; 
    var blnResult = true; 
    //var strSequence = document.frmQuestionDetail.txtSequence.value; 

    //test strString consists of valid characters listed above 

    if (strString.length == 0) 
        return false; 
    for (i = 0; i < strString.length && blnResult == true; i++) 
    { 
        strChar = strString.charAt(i); 
        if (strValidChars.indexOf(strChar) == -1) 
        { 
            blnResult = false; 
        } 
     } 
	return blnResult; 
}


/*
*
*/

function isValidTime(value) {
   var colonCount = 0;
   var hasMeridian = false;
   for (var i=0; i<value.length; i++) {
      var ch = value.substring(i, i+1);
      if ( (ch < '0') || (ch > '9') ) {
         if ( (ch != ':') && (ch != ' ') && (ch != 'a') && (ch != 'A') && (ch != 'p') && (ch != 'P') && (ch != 'm') && (ch != 'M')) {
            return false;
         }
      }
      if (ch == ':') { colonCount++; }
      if ( (ch == 'p') || (ch == 'P') || (ch == 'a') || (ch == 'A') ) { hasMeridian = true; }
   }
   if ( (colonCount < 1) || (colonCount > 2) ) { return false; }
   var hh = value.substring(0, value.indexOf(":"));
   if ( (parseFloat(hh) < 0) || (parseFloat(hh) > 23) ) { return false; }
   if (hasMeridian) {
      if ( (parseFloat(hh) < 1) || (parseFloat(hh) > 12) ) { return false; }
   }
   if (colonCount == 2) {
      var mm = value.substring(value.indexOf(":")+1, value.lastIndexOf(":"));
   } else {
      var mm = value.substring(value.indexOf(":")+1, value.length);
   }
   if ( (parseFloat(mm) < 0) || (parseFloat(mm) > 59) ) { return false; }
   if (colonCount == 2) {
      var ss = value.substring(value.lastIndexOf(":")+1, value.length);
   } else {
      var ss = "00";
   }
   if ( (parseFloat(ss) < 0) || (parseFloat(ss) > 59) ) { return false; }
   return true;
}