//  This set of script functions allows for client side validation  of a date --->

// Checks to see if the value is Numeric
// Taken from http://www.27seconds.com/kb/article_view.aspx?id=14
function isNumeric(sText) {
   var ValidChars = "0123456789.";
   var IsNumber=true;
   var Char;

 
   for (i = 0; i < sText.length && IsNumber == true; i++) 
      { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) 
         {
         IsNumber = false;
         }
      }
   return IsNumber;
}



function checkdateValue(sDate) {
    //Returns true if value is a date format or is NULL
    //otherwise returns false	

	var errMsg = 'Please enter the date in the correct format of MM/DD/YYYY';
	var element_value = sDate;
	
    if (element_value.length == 0)
        return true;

    //Returns true if value is a date in the mm/dd/yyyy format
	isplit = element_value.indexOf('/');

	if (isplit == -1 || isplit == element_value.length)	{
		return(false);
	}

    sMonth = element_value.substring(0, isplit);
	isplit = element_value.indexOf('/', isplit + 1);

	if (isplit == -1 || (isplit + 1 ) == element_value.length) {
		return(false);
	}

    sDay = element_value.substring((sMonth.length + 1), isplit);

	sYear = element_value.substring(isplit + 1);
	if ( sYear.length == 2) {
		sYear = '20' + sYear;
	}

	if (!checkinteger(sMonth)) {
		//check month 
		return(false);
	} else if (!checkrange(sMonth, 1, 12)) {
		return(false);
	} else if (!checkinteger(sYear)) {
		//check year
		return false;
	} else if (!checkrange(sYear, 1000, 9999)) {
		return(false);
	} else if (!checkinteger(sDay)) {
		//check day
		return(false);
	} else if (!checkday(sYear, sMonth, sDay)) {
		return(false);
	} else {
		return true;
    }
}

function checkdate(pForm, psElement) {
    //Returns true if value is a date format or is NULL
    //otherwise returns false	

	var errMsg = 'Please enter the date in the correct format of MM/DD/YYYY';
	var element = eval("document." + pForm + "." + psElement);
	var element_value = eval("document." + pForm + "." + psElement + ".value");
	
    if (element_value.length == 0)
        return true;

    //Returns true if value is a date in the mm/dd/yyyy format
	isplit = element_value.indexOf('/');

	if (isplit == -1 || isplit == element_value.length)
	{
		alert(errMsg);
		element.focus();
		return(false);
	}

    sMonth = element_value.substring(0, isplit);
	isplit = element_value.indexOf('/', isplit + 1);

	if (isplit == -1 || (isplit + 1 ) == element_value.length)
	{
		alert(errMsg);
		element.focus();
		return(false);
	}

    sDay = element_value.substring((sMonth.length + 1), isplit);

	sYear = element_value.substring(isplit + 1);

	if (!checkinteger(sMonth)) {
			//check month 
		alert(errMsg);
		element.focus();
		return(false);
	} else if (!checkrange(sMonth, 1, 12)) {
		alert(errMsg);
		element.focus();
		return(false);
	} else if (!checkinteger(sYear)) {
			//check year
		alert(errMsg);
		element.focus();
		return false;
	} else if (!checkrange(sYear, 1000, 9999)) {
		alert(errMsg);
		element.focus();
		return(false);
	} else if (!checkinteger(sDay)) {
			//check day
		alert(errMsg);
		element.focus();
		return(false);
	} else if (!checkday(sYear, sMonth, sDay)) {
		alert(errMsg);
		element.focus();
		return(false);
	} else {
		return true;
    }
}

function checkday(checkYear, checkMonth, checkDay)
    {

	maxDay = 31;

	if (checkMonth == 4 || checkMonth == 6 ||
			checkMonth == 9 || checkMonth == 11)
		maxDay = 30;
	else
	if (checkMonth == 2)
	{
		if (checkYear % 4 > 0)
			maxDay =28;
		else
		if (checkYear % 100 == 0 && checkYear % 400 > 0)
			maxDay = 28;
		else
			maxDay = 29;
	}

	return checkrange(checkDay, 1, maxDay); //check day
    }



function checkinteger(object_value)
    {
    //Returns true if value is a number or is NULL
    //otherwise returns false	

    if (object_value.length == 0)
        return true;

    //Returns true if value is an integer defined as
    //   having an optional leading + or -.
    //   otherwise containing only the characters 0-9.
	var decimal_format = ".";
	var check_char;

    //The first character can be + -  blank or a digit.
	check_char = object_value.indexOf(decimal_format)
    //Was it a decimal?
    if (check_char < 1)
	return checknumber(object_value);
    else
	return false;
    }
	
function checknumber(object_value)
    {
    //Returns true if value is a number or is NULL
    //otherwise returns false	

    if (object_value.length == 0)
        return true;

    //Returns true if value is a number defined as
    //   having an optional leading + or -.
    //   having at most 1 decimal point.
    //   otherwise containing only the characters 0-9.
	var start_format = " .+-0123456789";
	var number_format = " .0123456789";
	var check_char;
	var decimal = false;
	var trailing_blank = false;
	var digits = false;

    //The first character can be + - .  blank or a digit.
	check_char = start_format.indexOf(object_value.charAt(0))
    //Was it a decimal?
	if (check_char == 1)
	    decimal = true;
	else if (check_char < 1)
		return false;
        
	//Remaining characters can be only . or a digit, but only one decimal.
	for (var i = 1; i < object_value.length; i++)
	{
		check_char = number_format.indexOf(object_value.charAt(i))
		if (check_char < 0)
			return false;
		else if (check_char == 1)
		{
			if (decimal)		// Second decimal.
				return false;
			else
				decimal = true;
		}
		else if (check_char == 0)
		{
			if (decimal || digits)	
				trailing_blank = true;
        // ignore leading blanks

		}
	        else if (trailing_blank)
			return false;
		else
			digits = true;
	}	
    //All tests passed, so...
    return true
    }



function checkrange(object_value, min_value, max_value)
    {
    //if value is in range then return true else return false

    if (object_value.length == 0)
        return true;


    if (!checknumber(object_value))
	{
	return false;
	}
    else
	{
	return (numberrange((eval(object_value)), min_value, max_value));
	}
	
    //All tests passed, so...
    return true;
    }

function numberrange(object_value, min_value, max_value)
    {
    // check minimum
    if (min_value != null)
	{
        if (object_value < min_value)
		return false;
	}

    // check maximum
    if (max_value != null)
	{
	if (object_value > max_value)
		return false;
	}
	
    //All tests passed, so...
    return true;
    }


function isFutureDate(pForm, psElement,psMonth,psDay,psYear) {
	/*
	 *	This function checks that a date occurs in the future of the date specified
	 */
	 
	var errMsg = 'The date entered must occur in the future.';
	var element = eval("document." + pForm + "." + psElement);
	var element_value = eval("document." + pForm + "." + psElement + ".value");
	
    if (element_value.length == 0) {
			/*
			 *	The element is empty so return true
			 */
        return(true);
	} else {
			/*
			 *	Break out the month, day, and year pieces entered into the textbox.
			 */
		var month = element_value.substr(0,element_value.indexOf("/"));
		var sTempDate = element_value.substr(element_value.indexOf("/")+1,element_value.length-element_value.indexOf("/"));
		var day = sTempDate.substr(0,sTempDate.indexOf("/"));
		var sTempDate = sTempDate.substr(sTempDate.indexOf("/")+1,sTempDate.length);
		var year = sTempDate;


			/*
			 *  Make sure the month format is MM. If there is only one character
			 *	then we will need to add a zero in front. Do the same for the days.
			 */
		if (month.length == 1) {
				// add a preceding 0
			month = '0' + month;
		}
		if (day.length == 1) {
				// add a preceding 0
			day = '0' + day;
		}
		
			/*
			 *	First check the year, then the month and finally the day.
			 *	Check if the entered value is less than or greater than
			 *	the actual date. If it is not less than or greater than, then
			 *	they must be equal so check the next smaller measurement of
			 *	time.
			 */
		if (psYear < year) {
			return(true);
		} else if (psYear > year) {
			alert(errMsg);
			element.focus();
			return(false);
		} else if (psMonth < month) {
			return(true);
		} else if (psMonth > month) {
			alert(errMsg);
			element.focus();
			return(false);
		} else if (psDay <= day) {
			return(true);
 		} else { 
		 	alert(errMsg);
			element.focus(); 
			return(false);
		}
	}
}
	
		// Function to check the validity of the URL and correct it if possible
		function checkURL(FormField,URLField) {
			FieldObject = eval("document." + FormField + "." + URLField);
			URLString = FieldObject.value;
			if (URLString.length == 0) {
				return true();
			}
			//Strip off htttp:// for consistency
			if (URLString.substring(0,7) == "http://") {
				URLString = URLString.substring(7);
			}
			//Look for "/" to find the main host
			slashOne = URLString.indexOf("/")
			if (slashOne > 0) {
				coreURL = URLString.substring(0,slashOne);
				tailURL = URLString.substring(slashOne);
			} else {
				coreURL = URLString;
				tailURL = "";
			}
			
			//Search for "." in core
			dotOne = coreURL.indexOf(".")
			if (dotOne == -1) {
				alert("This is an invalid URL");
				return false();
			}
			//Add "www." if there is only 1 "." in the core.  If there is more than 1, we can't assume anything.
			if (coreURL.lastIndexOf(".") == dotOne) {
				newURL = "http://www." + coreURL + tailURL;
			} else {
				newURL = "http://" + coreURL + tailURL;
			}
//		alert(newURL);
			FieldObject.value = newURL;
		}

	// Function to check the validity of an email address
		function checkEmail(FormField,EmailField) {
			EmailString = eval("document." + FormField + "." + EmailField + ".value");
			EmailField = eval("document." + FormField + "." + EmailField);
			if (EmailString.length == 0) {
				return true;
			}
			//Look for "@" to find the main host
			atOne = EmailString.indexOf("@")
			if (atOne > 0) {
				emailUser = EmailString.substring(0,atOne);
				emailHost = EmailString.substring((atOne + 1));
			} else {
				alert("This is an invalid email address");
				EmailField.focus();
				return false;
			}
			//Search for "." in host
			dotOne = emailHost.indexOf(".")
			if (dotOne == -1) {
				alert("This is an invalid email address");
				EmailField.focus();
				return false;
			}
			return true;
		}

	//Function to check the validity of a phone number
	function checkPhone(FormField, PhoneField) {
		fieldString = eval("document." + FormField + "." + PhoneField);
		checkString = fieldString.value;
		if (checkString.length < 14) {
			if (checkString.length == 10) {
				//if formated as 1234567890
				phoneString = "(" + checkString.substring(0,3) + ") " + checkString.substring(3,6) + "-" + checkString.substring(6,10);
			} else if (checkString.length == 12) {
				// if formated as 123-456-7890
				phoneString = "(" + checkString.substring(0,3) + ") " + checkString.substring(4,7) + "-" + checkString.substring(8,12);
			} else if (checkString.length == 13) {
				if (checkString.substring(0,1) == "(" ) {
					// if formated as (123)456-7890
					phoneString = checkString.substring(0,5) + " " + checkString.substring(5	,13);
				} else {
					// if formated as ???
					phoneString = "(" + checkString.substring(0,3) + ") " + checkString.substring(4,7) + "-" + checkString.substring(9,13);
				}
			} else {
				phoneString = checkString;
			}
		} else {
			phoneString = checkString;
		}
		fieldString.value = phoneString;
	}
	
		//
		//	Function to check the given field to see if it is equal to or less than the given length
		//
	function checkLength( sFormName, sFieldName, nMaxLength) {
		rField = eval("document." + sFormName + "." + sFieldName);
		if (rField.value.length > nMaxLength) {
			alert("Your description is too long.  The max length is " + nMaxLength + " characters.  Your entry is " + rField.value.length + " characters.");
			return false;
		}
		return true;
	}
	
		//
		//	Function that will loop over the supplied fields and see if there is anything in them
		//
	function checkRequiredFields(sFieldsList, sMessageList, sFormName) {
		docform = eval("document." + sFormName);
		arRequiredFields = sFieldsList.split(",");
		arRequiredFieldsMessages = sMessageList.split(",");
		Message = ""
		for (element in arRequiredFields) {
			eItem = eval("docform." + arRequiredFields[element]);

			if ( eItem.value.length == 0 ) {
				Message = Message + arRequiredFieldsMessages[element] + " can not be blank\n";
				
			}
		}
		if (Message.length > 0) {
			alert(Message);
			return false;
		} else {
			return true;
		}
	}

		//
		//	Function that will loop over the supplied fields and see if all are blank 
		//	which probaly means the user doesn't want to submit it.
		//
	function checkForAllBlank(sFieldsList, sFormName) {
		docform = eval("document." + sFormName);
		arRequiredFields = sFieldsList.split(",");
		bAllBlank = true
		for (element in arRequiredFields) {
			eItem = eval("docform." + arRequiredFields[element]);

			if ( eItem.value.length > 0 ) {
				bAllBlank = false
			}
		}
		return bAllBlank;
	}