var sLetters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
//var sLetters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzƒŠŒŽšœžŸÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýþ";
var sNumbers = "0123456789";
var styleIsAfter = 1;
var styleIsBefore = 2;
var styleEqualTo = 3;

function IsFieldEmpty(aField)
{
	//alert(aField)
	if (aField.value.length < 1)
	{
		return true;
	}else{
		return false;
	}
}

function IsSelectUnique(aSelectArray){
	var bPassed = true;
	for ( var i = 0; i < aSelectArray.length; i++ )
	{
		for ( var x = 0; x < aSelectArray.length; x++ )
		{
			if ( x != i )
			{
				if ( aSelectArray[i].selectedIndex != 0 )
				{
					if ( aSelectArray[i].selectedIndex == aSelectArray[x].selectedIndex )
					{
						aSelectArray[x].selectedIndex = 0;
						bPassed = false;
					}
				}
			}
		}
	}
	return bPassed;
}

function isLetter(c)
{
	var bPassed = true;
	for (var i = 0;  i < sLetters.length;  i++)
	{
		if (c == sLetters.charAt(i)) break;
		if (i == (sLetters.length - 1))
		{
			bPassed = false;
			break;
		}
	}
	return bPassed;
}

function isNumber(c)
{
	var bPassed = true;
	for (var i = 0;  i < sNumbers.length;  i++)
	{
		if (c == sNumbers.charAt(i)) break;
		if (i == (sNumbers.length - 1))
		{
			bPassed = false;
			break;
		}
	}
	return bPassed;
}

function isChecked(el)
{
	var iReturn = 0
	if (el==true)
	{
		iReturn = 1
	}
	return iReturn
}

function IsNumberBetween(iNumber,iMin,iMax){
	return (Number( iNumber ) >= iMin && Number( iNumber ) <= iMax);
}

function ValidateMask(sInput, sMask)
{
	var bReturn = true;
	for ( var i = 0; i < sMask.length; i++ )
	{
		switch ( sMask.charAt(i) )
		{
			case "9":
				if (!isNumber(sInput.charAt(i)))
					bReturn = false;
				break;
			case "X":
				if (!isLetter(sInput.charAt(i)))
					bReturn = false;
				break;
			case "?":
				break;
			default:
				if (sMask.charAt(i) != sInput.charAt(i)) bReturn = false;
		}
	}
	return bReturn;
}

function IsValidDate(dateStr)
{
	var datePat = /^(\d{4})(\-)(\d{1,2})(\-)(\d{1,2})$/;
	var matchArray = dateStr.match(datePat);
	if (dateStr.length != 10) return false;
	if (matchArray == null) return false;
	var year = Number( matchArray[1] );
	var month = Number( matchArray[3] );
	var day = Number( matchArray[5] );
	if (month < 1 || month > 12) return false;
	if (day < 1 || day > 31) return false;
	if ((month==4 || month==6 || month==9 || month==11) && day==31) return false;
	if (month == 2) 
	{
		var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));
		if (day>29 || (day==29 && !isleap)) return false;
	}
	return true;
}

function CompareDates( date1, style, date2 )
{
	var datePat = /^(\d{4})(\-)(\d{1,2})(\-)(\d{1,2})$/;
	var matchArray1 = date1.match(datePat);
	var matchArray2 = date2.match(datePat);
	var year1 = matchArray1[1];
	var month1 = matchArray1[3];
	var day1 = matchArray1[5];
	var year2 = matchArray2[1];
	var month2 = matchArray2[3];
	var day2 = matchArray2[5];
	var bResult = false;
	switch(style)
	{
		case 2:
			if (year1 < year2)
				bResult = true;
			else
				if (month1 < month2)
					bResult = true;
				else
					if (day1 < day2)
						bResult = true;
			break;
		case 1:
			if (year1 > year2)
				bResult = true;
			else
				if (month1 > month2)
					bResult = true;
				else
					if (day1 > day2)
						bResult = true;
			break;
		default:
			if (year1 == year2 && month1 == month2 && day1 == day2)
				bResult = true;
			break;
		}
	return bResult;
}

function SubmitSurvey(aForm)
{
	if (ValidateSurvey(aForm)) 
	{
		var oButton = document.getElementById('submitbutton')
		oButton.disabled=true
		return true;
	}else{
		return false;
	}
}