function validate(form)
{
if(Validate_Required(form.txt_name,'Please enter your name')==false)
		return false;
if(Validate_Required(form.txt_email,'Please enter your email')==false)
		return false;
if(Validate_Email(form.txt_email,'Invalid email ! Please try user@domain.com')==false)
		return false;
if(Validate_Required(form.txt_phone,'Please enter your Phone')==false)
		return false;
if(Validate_Numeric(form.txt_phone,'0123456789+','Phone number should be numeric')==false)
		return false;
if(Validate_Required(form.Dep_Day,'Please enter departing date')==false)
		return false;
if(Validate_Required(form.Dep_Mon,'Please enter departing date')==false)
		return false;
if(Validate_Required(form.Dep_Year,'Please enter departing date')==false)
		return false;
/*var dt=form.txt_dep_date;
	if (isDate(dt.value)==false)
	{
		dt.focus()
		return false
	}*/
			
if(Validate_Required(form.Arr_Hour,'Please enter arriving time at terminal')==false)
		return false;
if(Validate_Required(form.Arr_Min,'Please enter arriving time at terminal')==false)
		return false;
/*if(IsValidTime(form.txt_arr_time)==false)
		return false;*/
if(Validate_Required(form.Ret_Day,'Please enter returning date')==false)
		return false;
if(Validate_Required(form.Ret_Mon,'Please enter returning date')==false)
		return false;
if(Validate_Required(form.Ret_Year,'Please enter returning date')==false)
		return false;
if(Validate_Required(form.Ret_Hour,'Please enter returning time')==false)
		return false;
if(Validate_Required(form.Ret_Min,'Please enter returning time')==false)
		return false;
/*if(IsValidTime(form.txt_return_time)==false)
		return false;*/
	 
}		


function validate_newsletter(form)
{
if(Validate_Required(form.name,'Please enter your name')==false)
		return false;
if(Validate_Required(form.email,'Please enter your email')==false)
		return false;
if(Validate_Email(form.email,'Invalid email ! Please try user@domain.com')==false)
		return false;
	 
}		


function Validate_Required(Ctrl,msg)
{
	if(Ctrl.value == "")
	{
		alert(msg);
		Ctrl.focus();
		return false;
	}
	return true;
}

function Validate_Numeric(Ctrl,valid_chars,msg)
{
	if(chkNumeric(Ctrl.value,valid_chars) == false)
	{
		alert(msg);
		Ctrl.focus();
		return false;
	}
	return true;
}

function chkNumeric(strString,strValidChars)
{
   var strChar;
   var blnResult = true;
 
   for (i = 0; i < strString.length && blnResult == true; i++)
   {
	  strChar = strString.charAt(i);
      if (strValidChars.indexOf(strChar) == -1)
      {
    	   blnResult = false;
      }
   }
   return blnResult;
}
function Validate_Email(Ctrl,msg)
{
	if(Ctrl.value == "")
		return true;
	if(chkEmail(Ctrl.value) == false)
	{
		alert(msg);
		Ctrl.focus();
		return false;
	}
	return true;
}

function chkEmail(str)
{
	return(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(str));
}


/*Date validation*/

var dtCh= "/";
var minYear=2000;
var maxYear=2500;

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 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)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	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
}
/*time validation*/
function IsValidTime(Ctrl) 
{
var timePat = /^(\d{1,2}):(\d{2})(:(\d{2}))?(\s?(AM|am|PM|pm))?$/;
var matchArray = Ctrl.value.match(timePat);
if (matchArray == null)
{
alert("Time is not in a valid format.");
Ctrl.focus();
return false;
}
hour = matchArray[1];
minute = matchArray[2];
second = matchArray[4];
if (second=="") 
{ second = null; 
}
if(hour.length < 2)
{
alert("Time is not in a valid format.");
Ctrl.focus();
return false;
}
if(minute.length < 2)
{
alert("Time is not in a valid format.");
Ctrl.focus();
return false;
}
if(second.length < 2)
{
alert("Time is not in a valid format.");
Ctrl.focus();
return false;
}
if (hour < 0  || hour > 23) 
{
alert("Hour must be between 0 and 23");
Ctrl.focus();
return false;
}
if (minute<0 || minute > 59) 
{
alert ("Minute must be between 0 and 59.");
Ctrl.focus();
return false;
}
if (second != null && (second < 0 || second > 59)) 
{
alert ("Second must be between 0 and 59.");
Ctrl.focus();
return false;
}
return true;
}