//// ***********  INICIO FORMATA E VALIDA DATA  ******************

// Check browser version
	var isNav4 = false, isNav5 = false, isIE4 = false;
	var strSeperator = "/";

// If you are using any Java validation on the back side you will want to use the / because
// Java date validations do not recognize the dash as a valid date separator.
	var vDateType = 3; // Global value for type of date format
	//                1 = mm/dd/yyyy
	//                2 = yyyy/dd/mm  (Unable to do date check at this time)
	//                3 = dd/mm/yyyy
	var vYearType = 4; //Set to 2 or 4 for number of digits in the year for Netscape
	var vYearLength = 2; // Set to 4 if you want to force the user to enter 4 digits for the year before validating.
	var err = 0; // Set the error code to a default of zero

	if(navigator.appName == "Netscape")
		{
		if (navigator.appVersion < "5")
			{
			isNav4 = true;
			isNav5 = false;
			}
		else
			if (navigator.appVersion > "4")
				{
				isNav4 = false;
				isNav5 = true;
				}
			}
	else
		{
		isIE4 = true;
		}

function DateFormat(vDateName, vDateValue, e, dateCheck, dateType)
	{
	vDateType = dateType;
	// vDateName = object name
	// vDateValue = value in the field being checked
	// e = event
	// dateCheck
	// True  = Verify that the vDateValue is a valid date
	// False = Format values being entered into vDateValue only
	// vDateType
	// 1 = mm/dd/yyyy
	// 2 = yyyy/mm/dd
	// 3 = dd/mm/yyyy
	//Enter a tilde sign for the first number and you can check the variable information.
	if (vDateValue == "~")
		{
		alert("AppVersion = "+navigator.appVersion+" \nNav. 4 Version = "+isNav4+" \nNav. 5 Version = "+isNav5+" \nIE Version = "+isIE4+" \nYear Type = "+vYearType+" \nDate Type = "+vDateType+" \nSeparator = "+strSeperator);
		vDateName.value = "";
		vDateName.focus();
		return true;
		}
	var whichCode = (window.Event) ? e.which : e.keyCode;
	// Check to see if a seperator is already present.
	// bypass the date if a seperator is present and the length greater than 8
	if (vDateValue.length > 8 && isNav4)
		{
		if ((vDateValue.indexOf("-") >= 1) || (vDateValue.indexOf("/") >= 1))
		return true;
		}
	//Eliminate all the ASCII codes that are not valid
	var alphaCheck = " abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ/-";
	if (alphaCheck.indexOf(vDateValue) >= 1)
		{
		if (isNav4)
			{
			vDateName.value = "";
			vDateName.focus();
			vDateName.select();
			return false;
			}
		else
			{
			vDateName.value = vDateName.value.substr(0, (vDateValue.length-1));
			return false;
			}
		}
	if (whichCode == 8) //Ignore the Netscape value for backspace. IE has no value
		return false;
	else {
		//Create numeric string values for 0123456789/
		//The codes provided include both keyboard and keypad values
		var strCheck = '47,48,49,50,51,52,53,54,55,56,57,58,59,95,96,97,98,99,100,101,102,103,104,105';
		if (strCheck.indexOf(whichCode) != -1)
			{
			if (isNav4)
				{
				if (((vDateValue.length < 6 && dateCheck) || (vDateValue.length == 7 && dateCheck)) && (vDateValue.length >=1))
					{
					alert("Data inválida");
					vDateName.value = "";
					vDateName.focus();
					vDateName.select();
					return false;
					}
			if (vDateValue.length == 6 && dateCheck)
				{
				var mDay = vDateName.value.substr(2,2);
				var mMonth = vDateName.value.substr(0,2);
				var mYear = vDateName.value.substr(4,4)

				//Turn a two digit year into a 4 digit year
				if (mYear.length == 2 && vYearType == 4)
					{
					var mToday = new Date();
					//If the year is greater than 30 years from now use 19, otherwise use 20
					var checkYear = mToday.getFullYear() + 30;
					var mCheckYear = '20' + mYear;
					if (mCheckYear >= checkYear)
						mYear = '19' + mYear;
					else
						mYear = '20' + mYear;
					}
				var vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
				if (!dateValid(vDateValueCheck))
					{
					alert("Data inválida");
					vDateName.value = "";
					vDateName.focus();
					vDateName.select();
					return false;
					}
				return true;
				}
			else
				{
				// Reformat the date for validation and set date type to a 1
				if (vDateValue.length >= 8  && dateCheck)
					{
					if (vDateType == 1) // mmddyyyy
						{
						var mDay = vDateName.value.substr(2,2);
						var mMonth = vDateName.value.substr(0,2);
						var mYear = vDateName.value.substr(4,4)
						vDateName.value = mMonth+strSeperator+mDay+strSeperator+mYear;
						}
					if (vDateType == 2) // yyyymmdd
						{
						var mYear = vDateName.value.substr(0,4)
						var mMonth = vDateName.value.substr(4,2);
						var mDay = vDateName.value.substr(6,2);
						vDateName.value = mYear+strSeperator+mMonth+strSeperator+mDay;
						}
					if (vDateType == 3) // ddmmyyyy
						{
						var mMonth = vDateName.value.substr(2,2);
						var mDay = vDateName.value.substr(0,2);
						var mYear = vDateName.value.substr(4,4)
						vDateName.value = mDay+strSeperator+mMonth+strSeperator+mYear;
						}

					//Create a temporary variable for storing the DateType and change
					//the DateType to a 1 for validation.
					var vDateTypeTemp = vDateType;
					vDateType = 1;
					var vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
					if (!dateValid(vDateValueCheck))
						{
						alert("Data inválida");
						vDateType = vDateTypeTemp;
						vDateName.value = "";
						vDateName.focus();
						vDateName.select();
						return false;
						}
					vDateType = vDateTypeTemp;
					return true;
					}
					else
						{
						if (((vDateValue.length < 8 && dateCheck) || (vDateValue.length == 9 && dateCheck)) && (vDateValue.length >=1))
							{
							alert("Data inválida");
							vDateName.value = "";
							vDateName.focus();
							vDateName.select();
							return false;
					         }
					    }
				   }
				}
			else {
				// Non isNav Check
				if (((vDateValue.length < 8 && dateCheck) || (vDateValue.length == 9 && dateCheck)) && (vDateValue.length >=1))
					{
					alert("Data inválida");
					vDateName.value = "";
					vDateName.focus();
					return true;
					}
				// Reformat date to format that can be validated. mm/dd/yyyy
				if (vDateValue.length >= 8 && dateCheck)
					{
					// Additional date formats can be entered here and parsed out to
					// a valid date format that the validation routine will recognize.
					if (vDateType == 1) // mm/dd/yyyy
						{
						var mMonth = vDateName.value.substr(0,2);
						var mDay = vDateName.value.substr(3,2);
						var mYear = vDateName.value.substr(6,4)
						}
					if (vDateType == 2) // yyyy/mm/dd
						{
						var mYear = vDateName.value.substr(0,4)
						var mMonth = vDateName.value.substr(5,2);
						var mDay = vDateName.value.substr(8,2);
						}
					if (vDateType == 3) // dd/mm/yyyy
						{
						var mDay = vDateName.value.substr(0,2);
						var mMonth = vDateName.value.substr(3,2);
						var mYear = vDateName.value.substr(6,4)
						}
					if (vYearLength == 4)
						{
						if (mYear.length < 4)
							{
							alert("Data inválida");
							vDateName.value = "";
							vDateName.focus();
							return true;
						   }
						}
					// Create temp. variable for storing the current vDateType
					var vDateTypeTemp = vDateType;
					// Change vDateType to a 1 for standard date format for validation
					// Type will be changed back when validation is completed.
					vDateType = 1;
					// Store reformatted date to new variable for validation.
					var vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
					if (mYear.length == 2 && vYearType == 4 && dateCheck)
						{
						//Turn a two digit year into a 4 digit year
						var mToday = new Date();
						//If the year is greater than 30 years from now use 19, otherwise use 20
						var checkYear = mToday.getFullYear() + 30;
						var mCheckYear = '20' + mYear;
						if (mCheckYear >= checkYear)
							mYear = '19' + mYear;
						else
							mYear = '20' + mYear;
						vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
						// Store the new value back to the field.  This function will
						// not work with date type of 2 since the year is entered first.
						if (vDateTypeTemp == 1) // mm/dd/yyyy
							vDateName.value = mMonth+strSeperator+mDay+strSeperator+mYear;
						if (vDateTypeTemp == 3) // dd/mm/yyyy
							vDateName.value = mDay+strSeperator+mMonth+strSeperator+mYear;
						}
					if (!dateValid(vDateValueCheck))
						{
						alert("Data inválida");
						vDateType = vDateTypeTemp;
						vDateName.value = "";
						vDateName.focus();
						return true;
						}
					vDateType = vDateTypeTemp;
					return true;
					}
				else
					{
					if (vDateType == 1)
						{
						if (vDateValue.length == 2)
							{
							vDateName.value = vDateValue+strSeperator;
							}
						if (vDateValue.length == 5)
							{
							vDateName.value = vDateValue+strSeperator;
							}
						}
					if (vDateType == 2)
						{
						if (vDateValue.length == 4)
							{
							vDateName.value = vDateValue+strSeperator;
							}
						if (vDateValue.length == 7)
							{
							vDateName.value = vDateValue+strSeperator;
							}
						}
					if (vDateType == 3)
						{
						if (vDateValue.length == 2)
							{
							vDateName.value = vDateValue+strSeperator;
							}
						if (vDateValue.length == 5)
							{
							vDateName.value = vDateValue+strSeperator;
							}
						}
						return true;
				   }
				}
			if (vDateValue.length == 10&& dateCheck)
				{
				if (!dateValid(vDateName))
					{
					// Un-comment the next line of code for debugging the dateValid() function error messages
					//alert(err);
					alert("Data inválida");
					vDateName.focus();
					vDateName.select();
					}
				}
				return false;
			}
		else {
			// If the value is not in the string return the string minus the last
			// key entered.
			if (isNav4)
				{
				vDateName.value = "";
				vDateName.focus();
				vDateName.select();
				return false;
				}
			else
				{
				vDateName.value = vDateName.value.substr(0, (vDateValue.length-1));
				return false;
		        }
		    }
		}
	}

function dateValid(objName) {
	var strDate;
	var strDateArray;
	var strDay;
	var strMonth;
	var strYear;
	var intday;
	var intMonth;
	var intYear;
	var booFound = false;
	var datefield = objName;
	var strSeparatorArray = new Array("-"," ","/",".");
	var intElementNr;
	// var err = 0;
	var strMonthArray = new Array(12);
	strMonthArray[0] = "Jan";
	strMonthArray[1] = "Feb";
	strMonthArray[2] = "Mar";
	strMonthArray[3] = "Apr";
	strMonthArray[4] = "May";
	strMonthArray[5] = "Jun";
	strMonthArray[6] = "Jul";
	strMonthArray[7] = "Aug";
	strMonthArray[8] = "Sep";
	strMonthArray[9] = "Oct";
	strMonthArray[10] = "Nov";
	strMonthArray[11] = "Dec";
	//strDate = datefield.value;
	strDate = objName;
	if (strDate.length < 1)
		{
		return true;
		}
	for (intElementNr = 0; intElementNr < strSeparatorArray.length; intElementNr++)
		{
		if (strDate.indexOf(strSeparatorArray[intElementNr]) != -1)
			{
			strDateArray = strDate.split(strSeparatorArray[intElementNr]);
			if (strDateArray.length != 3)
				{
				err = 1;
				return false;
				}
			else
				{
				strDay = strDateArray[0];
				strMonth = strDateArray[1];
				strYear = strDateArray[2];
				}
			booFound = true;
			}
		}

	if (booFound == false)
		{
		if (strDate.length>5)
			{
			strDay = strDate.substr(0, 2);
			strMonth = strDate.substr(2, 2);
			strYear = strDate.substr(4);
			}
		}

	//Adjustment for short years entered
	if (strYear.length == 2)
		{
		strYear = '20' + strYear;
		}
	strTemp = strDay;
	strDay = strMonth;
	strMonth = strTemp;
	intday = parseInt(strDay, 10);

	if (isNaN(intday))
		{
		err = 2;
		return false;
		}
	intMonth = parseInt(strMonth, 10);
	if (isNaN(intMonth))
		{
		for (i = 0;i<12;i++)
			{
			if (strMonth.toUpperCase() == strMonthArray[i].toUpperCase())
				{
				intMonth = i+1;
				strMonth = strMonthArray[i];
				i = 12;
				}
			}
		if (isNaN(intMonth))
			{
			err = 3;
			return false;
			}
		}
	intYear = parseInt(strYear, 10);
	if (isNaN(intYear))
		{
		err = 4;
		return false;
		}
	if (intMonth>12 || intMonth<1)
		{
		err = 5;
		return false;
		}
	if ((intMonth == 1 || intMonth == 3 || intMonth == 5 || intMonth == 7 || intMonth == 8 || intMonth == 10 || intMonth == 12) && (intday > 31 || intday < 1))
		{
		err = 6;
		return false;
		}
	if ((intMonth == 4 || intMonth == 6 || intMonth == 9 || intMonth == 11) && (intday > 30 || intday < 1))
		{
		err = 7;
		return false;
		}
	if (intMonth == 2)
		{
		if (intday < 1)
			{
			err = 8;
			return false;
			}
		if (LeapYear(intYear) == true)
			{
			if (intday > 29)
				{
				err = 9;
				return false;
				}
			}
		else
			{
			if (intday > 28)
				{
				err = 10;
				return false;
				}
			}
		}
		return true;
		}

	function LeapYear(intYear)
		{
		if (intYear % 100 == 0)
			{
			if (intYear % 400 == 0) { return true; }
			}
		else
			{
			if ((intYear % 4) == 0) { return true; }
			}
		return false;
		}
	//// ***********  FIM FORMATA E VALIDA DATA  ******************