// Declaring required variables
var digits = "0123456789";
// non-digit characters which are allowed in phone numbers
var phoneNumberDelimiters = "()- ";
// characters which are allowed in international phone numbers
// (a leading + is OK)
var validWorldPhoneChars = phoneNumberDelimiters + "";
// Minimum no of digits in an international phone no.
var minDigitsInIPhoneNumber = 10;

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++)
    {   
        // Check that current character isn't whitespace.
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function checkInternationalPhone(strPhone){
s=stripCharsInBag(strPhone,validWorldPhoneChars);
return (isInteger(s) && s.length >= minDigitsInIPhoneNumber);
}

function validEmail(email) {
			invalidChars = " /:,#'`$~!%^&*()+\"\;<>?\\|	"
			
			if (email == "") {						// cannot be empty
				return false
			}
			for (i = 0; i < invalidChars.length; i++) {	// does it contain any invalid characters?
				badChar = invalidChars.charAt(i)
				if (email.indexOf(badChar,0) > -1) {
					return false
				}
			}
			atPos = email.indexOf("@",1)			// there must be one "@" symbol
			if (atPos == -1) {
				return false
			}
			if (email.indexOf("@",atPos+1) != -1) {	// and only one "@" symbol
				return false
			}
			periodPos = email.indexOf(".",atPos)
			if (periodPos == -1) {					// and at least one "." after the "@"
				return false
			}
			if (periodPos+3 > email.length)	{		// must be at least 2 characters after the "."
				return false
			}
			return true
	}
	
/*
DATE VALIDATION FUNCTION
*/

// 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 must be : mm/dd/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
}


/* --------------------------------- */	
	
function Validator(form1)
{
	var chkPhone=document.form1.phone
	var chkFax=document.form1.fax
	
  if (form1.fname.value == "")
  {
    alert("Please enter a value for the \"First Name\" field.");
    form1.fname.focus();
    return (false);
  }
  if (form1.lname.value == "")
  {
    alert("Please enter a value for the \"Last Name\" field.");
    form1.lname.focus();
    return (false);
  }
  if (form1.company.value == "")
  {
    alert("Please enter a value for the \"Company Name\" field.");
    form1.company.focus();
    return (false);
  }
  if (form1.address.value == "")
  {
    alert("Please enter a value for the \"Address\" field.");
    form1.address.focus();
    return (false);
  }
  if (form1.city.value == "")
  {
    alert("Please enter a value for the \"City\" field.");
    form1.city.focus();
    return (false);
  }
  if (form1.ddlCountry.selectedIndex == "")
  {
    alert("Please enter a value for the \"Country\" field.");
    form1.ddlCountry.focus();
    return (false);
  }
  if (form1.ddlState.selectedIndex == "")
  {
    alert("Please enter a value for the \"State\" field.");
    form1.ddlState.focus();
    return (false);
  }
  if (form1.zip.value == "")
  {
    alert("Please enter a value for the \"Postal Code\" field.");
    form1.zip.focus();
    return (false);
  }
  if (form1.phone.value == "")
  {
    alert("Please enter a value for the \"Phone\" field.");
    form1.phone.focus();
    return (false);
  }
  if (form1.phone.value != "")
  {
	if (checkInternationalPhone(chkPhone.value)==false){
		alert("Please Enter a Valid Phone Number.\nXXX-XXX-XXXX")
		//Phone.value=""
		chkPhone.focus()
		return (false);
	}
  }
  if (form1.fax.value != "")
  {
	if (checkInternationalPhone(chkFax.value)==false){
		alert("Please Enter a Valid Fax Number.\nXXX-XXX-XXXX")
		//fax.value=""
		chkFax.focus()
		return (false);
	}
  }
  if (form1.email.value == "")
  {
    alert("Please enter a value for the \"Email Address\" field.");
    form1.email.focus();
    return (false);
  }
  if ((form1.email.value.length < 7) && (form1.email.value.length !=0))
  {
    alert("Please enter at least 7 characters in the \"E-mail Address\" field.");
    form1.email.focus();
    return (false);
  }
  if (!(validEmail(form1.email.value)))
      {
         alert("Invalid Email Address")
         form1.email.focus()
         return (false)
      }
  /*
  if (form1.eventArrDate.value == "")
    {
	  alert("Please enter a value for the \"Arrival Date\" field.");
	  form1.eventArrDate.focus();
	  return (false);
	}
  if (form1.eventDepDate.value == "")
    {
	  alert("Please enter a value for the \"Departure Date\" field.");
	  form1.eventDepDate.focus();
	  return (false);
	}
	*/
  if (form1.eventArrDate.value != "")
    {
	var dt=document.form1.eventArrDate
	if (isDate(dt.value)==false){
		dt.focus();
		return (false);
		}
	}
  if (form1.eventDepDate.value != "")
    {
	var dt=document.form1.eventDepDate
	if (isDate(dt.value)==false){
		dt.focus();
		return (false);
		}
	}
  if (form1.sr_date01.value != "")
    {
	var dt=document.form1.sr_date01
	if (isDate(dt.value)==false){
		dt.focus();
		return (false);
		}
	}
  if (form1.sr_date02.value != "")
    {
	var dt=document.form1.sr_date02
	if (isDate(dt.value)==false){
		dt.focus();
		return (false);
		}
	}
  if (form1.sr_date03.value != "")
    {
	var dt=document.form1.sr_date03
	if (isDate(dt.value)==false){
		dt.focus();
		return (false);
		}
	}
  if (form1.sr_date04.value != "")
    {
	var dt=document.form1.sr_date04
	if (isDate(dt.value)==false){
		dt.focus();
		return (false);
		}
	}
  if (form1.er_date01.value != "")
    {
	var dt=document.form1.er_date01
	if (isDate(dt.value)==false){
		dt.focus();
		return (false);
		}
	}
  if (form1.er_date02.value != "")
    {
	var dt=document.form1.er_date02
	if (isDate(dt.value)==false){
		dt.focus();
		return (false);
		}
	}
  if (form1.er_date03.value != "")
    {
	var dt=document.form1.er_date03
	if (isDate(dt.value)==false){
		dt.focus();
		return (false);
		}
	}
  if (form1.er_date04.value != "")
    {
	var dt=document.form1.er_date04
	if (isDate(dt.value)==false){
		dt.focus();
		return (false);
		}
	}
  if (form1.er_date05.value != "")
    {
	var dt=document.form1.er_date05
	if (isDate(dt.value)==false){
		dt.focus();
		return (false);
		}
	}
   


/*
-- Selection box
if (form1.test.selectedIndex == 0)
  {
    alert("Test \"Test\".");
    form1.test.focus();
    return (false);
  }
*/
/*
-- Checkboxes
  if (!form1.test.checked && !form1.test.checked && !form1.test.checked && !form1.test.checked && !form1.test.checked)
  {
    alert("Please select a \"test\".");
    //form1.test.focus();
    return (false);
  }
*/
	return (true);
}