// JavaScript Document

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 isEmailAddr(email)
{
  var result = false;
  var theStr = new String(email);
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
	result = true;
  }
  return result;
}

function validRequired(formField,fieldLabel)
{
	var result = true;
	
	if (formField.value == "" || formField.value == "none")
	{
		alert('Please enter or select "' + fieldLabel +'" ');
		formField.focus();
		result = false;
	}
	
	return result;
}

function validateUrl(theCtl) 
{ 
	var v = new RegExp(); 
	var result = true;
	
	v.compile("^[A-Za-z]+://[A-Za-z0-9-_]+\\.[A-Za-z0-9-_%&\?\/.=]+$"); 
	if (v.test(theCtl.value))
	{ 
		result = true;
	}
	else
	{
		alert("You must supply a valid URL."); 
		theCtl.focus();
		result = false;
	}
	
	return result;
}


function validCheck(formField,fieldLabel)
{
	var result = true;
	
	if (formField.value == "CREDIT;002" || formField.value == "DEBIT;003")
	{
		alert('Sorry!!! Entries cannot be made for the selected account here.');
		formField.focus();
		result = false;
	}
	
	return result;
}

function validRequiredAll(formField,fieldLabel)
{
	var result = true;
	
	if (formField.value == "" || formField.value == "none")
	{
		//alert('You have to select or enter a criteria for at least one field .');
		//formField.focus();
		result = false;
	}
	
	return result;
}


function validYes(formField)
{
	var result = true;
	
	if (formField.value == "Yes")
	{
		result = false;
	}
	
	return result;
}

function allDigits(str)
{
	return inValidCharSet(str,"0123456789");
}

function inValidCharSet(str,charset)
{
	var result = true;

	// Note: doesn't use regular expressions to avoid early Mac browser bugs	
	for (var i=0;i<str.length;i++)
		if (charset.indexOf(str.substr(i,1))<0)
		{
			result = false;
			break;
		}
	
	return result;
}

function validEmail(formField,fieldLabel,required)
{
	var result = true;
	
	if (required && !validRequired(formField,fieldLabel))
		result = false;

	if (result && ((formField.value.length < 3) || !isEmailAddr(formField.value)) )
	{
		alert("Please enter a complete email address in the form: yourname@yourdomain.com");
		formField.focus();
		result = false;
	}
   
  return result;

}

function validNum(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result)
 	{
 		if (!allDigits(formField.value))
 		{
 			alert('Please enter a number for the "' + fieldLabel +'" field.');
			formField.focus();		
			result = false;
		}
	} 
	
	return result;
}


function validInt(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result)
 	{
 		var num = parseInt(formField.value);
 		if (isNaN(num))
 		{
 			alert('Please enter a number for the "' + fieldLabel +'" field.');
			formField.focus();		
			result = false;
		}
	} 
	
	return result;
}


function validDate(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result)
 	{
 		var elems = formField.value.split("/");
 		
 		result = (elems.length == 3); // should be three components
 		
 		if (result)
 		{
 			var month = parseInt(elems[0]);
  			var day = parseInt(elems[1]);
 			var year = parseInt(elems[2]);
						
			result = allDigits(elems[0]) && (month > 0) && (month < 13) &&
					 allDigits(elems[1]) && (day > 0) && (day < 32) &&
					 allDigits(elems[2]) && ((elems[2].length == 2) || (elems[2].length == 4));					 
 		}
 		
  		if (!result)
 		{
 			alert('Please enter a date in the format MM/DD/YYYY for the "' + fieldLabel +'" field.');
			formField.focus();		
		}
	} 
	
	return result;
}

function validFebDate(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result)
 	{
 		var elems = formField.value.split("/");
 		
 		result = (elems.length == 3); // should be three components
 		
 		if (result)
 		{
 			var month = parseInt(elems[0]);
  			var day = parseInt(elems[1]);
 			var year = parseInt(elems[2]);
			if (month == 2){
				result = ((month == 2) && (day < daysInFebruary (year)));
			}
 		}
 				
		if (!result)
		{
			alert('Please enter a valid date in February for the "' + fieldLabel +'" field.');
			formField.focus();
		}
	} 
	
	return result;
}

function validYearMonth(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result)
 	{
 		var elems = formField.value.split("/");
 		
 		result = (elems.length == 2); // should be three components
 		
 		if (result)
 		{
 			var month = parseInt(elems[0]);
  			//var day = parseInt(elems[1]);
 			var year = parseInt(elems[1]);
						
			result = allDigits(elems[0]) && (month > 0) && (month < 13) &&
					 allDigits(elems[1]) && ((elems[1].length == 2) || (elems[1].length == 4)); //allDigits(elems[1]) && (day > 0) && (day < 32) &&					 
 		}
 		
  		if (!result)
 		{
 			alert('Please enter a date in the format MM/YYYY for the "' + fieldLabel +'" field.');
			formField.focus();		
		}
	} 
	
	return result;
}

function isValidDate(dateStr) {
// Date validation Function courtesty of 
// Sandeep V. Tamhankar (stamhankar@hotmail.com) -->

// Checks For the following valid Date formats:
// MM/DD/YY MM/DD/YYYY MM-DD-YY MM-DD-YYYY

var datePat = /^(\d{1,2})(\/|-)(\d{1,2})\2(\d{4})$/; // requires 4 digit Year

var matchArray = dateStr.match(datePat); // Is the format ok?
if (matchArray == Null) {
alert(dateStr + " Date is not in a valid format.")
return false;
}
Month = matchArray[1]; // parse Date into variables
Day = matchArray[3];
Year = matchArray[4];
if (Month < 1 || Month > 12) { // check Month range
alert("Month must be between 1 and 12.");
return false;
}
if (Day < 1 || Day > 31) {
alert("Day must be between 1 and 31.");
return false;
}
if ((Month==4 || Month==6 || Month==9 || Month==11) && Day==31) {
alert("Month "+Month+" doesn't have 31 days!")
return false;
}
if (Month == 2) { // check For february 29th
var isleap = (Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0));
if (Day>29 || (Day==29 && !isleap)) {
alert("February " + Year + " doesn't have " + Day + " days!");
return false;
}
}
return true;
}