/*
================================================================================
dateformat.js : funcoes para validacao e formatacao de estilo de datas em js
--------------------------------------------------------------------------------
Autor: ?
--------------------------------------------------------------------------------
Ultima Alteracao: 20/07/05             |  Autor: Rafael <rafaelc@vegait.com.br>
--------------------------------------------------------------------------------
================================================================================
*/


/* Controle de Datas: mascara, formato, validacao */

/* Original:  Richard Gorremans (RichardG@spiritwolfx.com) */
/* Web Site:  http://www.spiritwolfx.com */

/*
<input name="qualquernome" size="12" maxlength="10"
       onFocus="javascript:vDateType='3'"
       onKeyUp="DateFormat(this,this.value,event,false,'3')"
       onBlur="DateFormat(this,this.value,event,true,'3')">
*/
// 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;
mDateValue = vDateValue;

// 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.charAt(vDateValue.length-1)) >= 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 = 'undefined,0,47,48,49,50,51,52,53,54,55,56,57,58,59,65,95,96,97,98,99,100,101,102,103,104,105';
		if (strCheck.indexOf(whichCode) != -1)
		{
			if (isNav4)
			{
				if (((vDateValue.length < 6 && dateCheck) || (vDateValue.length == 7 && dateCheck)) && (vDateValue.length >=1))
				{
					alert("Data informada incorreta. O formato padrão é dd/mm/aaaa");
					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 informada incorreta. O formato padrão é dd/mm/aaaa");
						vDateName.value = "";
						vDateName.focus();
						vDateName.select();
						return false;
					}
					vDateName.value = vDateValueCheck;
					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 informada incorreta. O formato padrão é dd/mm/aaaa");
							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 informada incorreta. O formato padrão é dd/mm/aaaa");
							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 informada incorreta. O formato padrão é dd/mm/aaaa");
					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 informada incorreta. O formato padrão é dd/mm/aaaa");
							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 informada incorreta. O formato padrão é dd/mm/aaaa");
						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 informada incorreta. O formato padrão é dd/mm/aaaa");
					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
			{
			if (whichCode != 16){
					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;
		}