//Current date in form script
//By Lee Hinder (lee.hinder@ntlworld.com)
//Visit http://javascriptkit.com for this script and more

//set todays date

Now = new Date();
NowDay = Now.getDate();
NowMonth = Now.getMonth();
NowYear = Now.getYear();
if (NowYear < 2000) NowYear += 1900; //for Netscape


//function for returning how many days there are in a month including leap years

function DaysInMonth(WhichMonth, WhichYear)
{
var DaysInMonth = 31;

if (WhichMonth == "Apr" || WhichMonth == "Jun" || WhichMonth == "Sep" || WhichMonth == "Nov") DaysInMonth = 30;

if (WhichMonth == "Feb" && (WhichYear/4) != Math.floor(WhichYear/4))
DaysInMonth = 28;

if (WhichMonth == "Feb" && (WhichYear/4) == Math.floor(WhichYear/4))
DaysInMonth = 29;

return DaysInMonth;
}


//function to change the available days in a months

function ChangeOptionDays(Which)
{
DaysObject = eval("document.Form1." + "zday");
MonthObject = eval("document.Form1."  + "zmonth");
YearObject = eval("document.Form1."  + "zyear");

Month = MonthObject[MonthObject.selectedIndex].text;
Year = YearObject[YearObject.selectedIndex].text;

DaysForThisSelection = DaysInMonth(Month, Year);

CurrentDaysInSelection = DaysObject.length;

if (CurrentDaysInSelection > DaysForThisSelection)
{
for (i=0; i<(CurrentDaysInSelection-DaysForThisSelection); i++)
{
DaysObject.options[DaysObject.options.length - 1] = null
}
}

if (DaysForThisSelection > CurrentDaysInSelection)
{
for (i=0; i<(DaysForThisSelection-CurrentDaysInSelection); i++)
{
NewOption = new Option(DaysObject.options.length + 1);
DaysObject.add(NewOption);
}
}

if (DaysObject.selectedIndex < 0) DaysObject.selectedIndex == 0;
}


//function to set options to today

function SetToToday(Which)
{

DaysObject = eval("document.Form1."  + "zday");
MonthObject = eval("document.Form1."  + "zmonth");
YearObject = eval("document.Form1."  + "zyear");


YearObject[0].selected = true;
MonthObject[NowMonth].selected = true;

ChangeOptionDays(Which);

DaysObject[NowDay-1].selected = true;
}


//function to write option years plus x

function WriteYearOptions(YearsAhead)
{
line = "";

for (i=0; i<YearsAhead; i++)
{
line += "<OPTION>";
line += NowYear + i;
}

return line;
}