//***********************************************************************************
//Function to check the Date Format
//***********************************************************************************

//Begin Check browser version

var isNav4 = false;
var isNav5 = false;
var 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
//var strMessage = "<%=objLkpLang.LookupValue("register26")%>";
var strMessage = "Por favor indica una fecha válida";

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, strMsg) {


	vDateType = dateType;
	
	strMessage = strMsg;
	
	// 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("Por favor indica una fecha válida");
					alert(strMessage);
					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("Por favor indica una fecha válida");
						alert(strMessage);
						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("Por favor indica una fecha válida");
							alert(strMessage);
							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("Por favor indica una fecha válida");
								alert(strMessage);
								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("Por favor indica una fecha válida");
						alert(strMessage);
						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("Por favor indica una fecha válida");
								alert(strMessage);
								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("Por favor indica una fecha válida");
						alert(strMessage);
						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("Por favor indica una fecha válida");
					alert(strMessage);
					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;
}

//=======================================================================================

//Browser Compatible for the script: IE 2.0 or Higher or Netscape 2.0 or Higher

function CheckForValidChar(varText, checkType) {

	//-----------------------------------------------
	//Name:				CheckForValidChar()
	//Purpose:			
	//Last Prog:		Walter Lino / Mike Dowling
	//Last Date:		10/31/01
	//Parameters:		2 - 
	//						a.) String to check
	//						b.) Type of check to do
	//Return Value:  	"True" means valid
	//				 	"False" means not valid
	//-----------------------------------------------

	var myRegExp;


	switch (checkType) {

		case "alpha_num" :							//Accepts only Alpha Numeric characters and spaces.

			myRegExp = /[^\d\w ]/i;
			return !(myRegExp.test(varText));
			break;

		case "num" :								//Accepts only Numeric characters (positive)

			myRegExp = /^[ ]*[+]?\d+[ ]*$/;
			return (myRegExp.test(varText));
			break;

		case "space" :								//Accepts no spaces in string

			myRegExp = " ";

			//If a positive number was found then a space exist
			if (varText.indexOf(myRegExp) == -1) {
				return false;
			}
			else {
				return true;
			}

			break;

	}

}

//=======================================================================================


function restore(){
	var i, x, a = document.swaps; 
	if( a ) for( i = 0; i < a.length; i++)
		if( a[i].oldSrc ) a[i].src=a[i].oldSrc;
}

function swap(){ 
	var i, j = 0, a = swap.arguments; 
	document.swaps = new Array; 
	for( i = 0; i < ( a.length - 1 ); i += 2 ){
		document.swaps[j++] = a[i];
		if( !a[i].oldSrc ) a[i].oldSrc = a[i].src;
		a[i].src = a[i + 1];
	}
}

//=======================================================================================

function jumpMenu(strUrl,strTarget){
	if (strTarget == '_self'){
		document.location.href = strUrl;
	}else{
		window.open(strUrl,'newwindow','');
	}
}

//=======================================================================================