//start new script code

	function isLeapYear( yrStr ) {
		var leapYear = false;
		var year = parseInt( yrStr, 10 );
		// every fourth year is a leap year
		if ( year % 4 == 0 ) {
			leapYear = true;
			// unless it's a multiple of 100
			if ( year % 100 == 0 ) {
				leapYear = false;
				// unless it's a multiple of 400
				if ( year % 400 == 0 ) {
					leapYear=true;
				}
			}
		}
		return leapYear;
	}

	function getDaysInMonth( mthIdx, YrStr ) {
		// all the rest have 31
		var maxDays = 31
		// expect Feb. (of course)
		if ( mthIdx == 1 ) {
			if ( isLeapYear( YrStr ) ) {
				maxDays=29;
			} else {
				maxDays=28;
			}
		}

		// thirty days hath...
		if ( mthIdx == 3 || mthIdx == 5 || mthIdx == 8 || mthIdx == 10 ) {
			maxDays=30;
		}
		return maxDays;
	}

	//the function which does some magic to the date fields
	// return non-zero if it is the last day of the month
	function adjustDate( mthIdx, Dt ) {
		var value = 0;

		var today = new Date()
		var theYear = parseInt( today.getYear(), 10 )

		if ( mthIdx < today.getMonth() ) {
			theYear = ( parseInt( today.getYear(), 10 ) + 1 )
		}
		if ( theYear < 100 ) {
			theYear = "19" + theYear
		} else {
			if ( ( theYear - 100 ) < 10 ) {
				theYear = "0" + ( theYear - 100 )
			} else {
				theYear = ( theYear - 100 ) + ""
			}
			theYear = "20" + theYear
		}


		var numDays = getDaysInMonth( mthIdx, theYear );

		if ( mthIdx == 1 ) {
			if ( Dt.options.selectedIndex + 2 < numDays ) {
				return 0;
			} else {
				if ( Dt.options.selectedIndex + 1 > numDays) {
					Dt.options.selectedIndex=numDays - 1;
				}
				//check for leap year
				if ( (Dt.options.selectedIndex + 1) == numDays ) {
					return 1;
				} else {
					return 4;
				}
			}
		}

		if ( Dt.options.selectedIndex + 2 < numDays ) {
			value = 0;
		} else {
			if ( Dt.options.selectedIndex + 1 > numDays ) {
				Dt.options.selectedIndex--;
				value = 3;
			} else if ( Dt.options.selectedIndex + 1 == numDays ) {
				//index is 31 or 30
				value = 2;
			} else {
				value = 4;
			}
		}
		return value;
	}

	//changes departure month when arrival month is changed
	function amadChange( inM, inD, outM, outD ) {
		var res = adjustDate( inM.options.selectedIndex, inD );
		if ( res != 0 ) {
			   outD.options.selectedIndex = 0;
			   if ( inM.options.selectedIndex == 11 ) {
					outM.options.selectedIndex = 0
			   } else if ( res == 4 ) {
					outM.options.selectedIndex=inM.options.selectedIndex + 1;
					outD.options.selectedIndex = 0;
			   } else {
					outM.options.selectedIndex=inM.options.selectedIndex + 1;
					outD.options.selectedIndex = 1;
			   }
		} else {
			outM.options.selectedIndex = inM.options.selectedIndex;
			if (outD.options.selectedIndex <= inD.options.selectedIndex) {
				outD.options.selectedIndex = inD.options.selectedIndex + 2;
			}
		}
		return;
	}


	function dmddChange( outM, outD ) {
		adjustDate( outM.options.selectedIndex, outD );
		return;
	}