Javascript global variable!

Hello,
I have a calendar javascript file who is used to fill a date field, in a form.
After this the value of this date field it’s copied to another second date field
with diferent format.
The calendar javascript file is called in a onFocus event. After chose the date
the field is filled and a function called CopyIt() copy the date value changed
to the second date field.
The problem that I need to specify the id of the date fields to be used in CopyIt()
funtion, in calendar javascript file, but I don’t want.
If I need to use this calendar javascript file in another form in the same page
I need to duplicate the javascript file with other id date fields in CopyIt().
What I want that to use only one calendar javascript file to more date fields
only pass throuth the onFocus event the id of the date field respective.
But I don’t know how to create a “global” variable in javascript file with the
id of the date field to be used in CopyIt() function.

Any help????

This the input form fields:

<input name=”fdata” size=”12″ maxlength=”10″ style=”border:1px solid #003399; font-family: Verdana; font-size: 10px; padding-left:4px; padding-right:4px; padding-top:1px; padding-bottom:1px color:#999999px” onfocus=”showCalendarControl(fdata);” value=”” id=”fdata” readonly>
<input name=”fdata2″ size=”15″ value=”” id=”fdata2″>

This is the calendar javascript file:

function formataData(num) {
var dataS = new String(num);
var dataPartes = dataS.split(“-“);

var sDia = parseInt(dataPartes[0],10);
if (sDia < 10){ sDia = “0” + sDia }
var sMes = parseInt(dataPartes[1],10);
if (sMes < 10){ sMes = “0” + sMes }
var sAno = parseInt(dataPartes[2],10);
var Data = sMes + “-” + sDia + “-” + sAno;
return Data;

}

function copyIt() {
cp = “fdata”;
var x = document.getElementById(cp).value;
document.getElementById(cp + “2”).value = formataData(x);
}
…
function CalendarControl() {

var calendarId = ‘CalendarControl’;
var currentYear = 0;
var currentMonth = 0;
var currentDay = 0;

var selectedYear = 0;
var selectedMonth = 0;
var selectedDay = 0;

var months = [‘Janeiro’,’Fevereiro’,’Março’,’Abril’,’Maio’,’Junho’,’Julho’,’Agosto’,’Setembro’,’Outubro’,’Novembro’,’Dezembro’];
var dateField = null;

…
function getDaysInMonth(year, month) {
return [31,((!(year % 4 ) && ( (year % 100 ) || !( year % 400 ) ))?29:28),31,30,31,30,31,31,30,31,30,31][month-1];
}

function getDayOfWeek(year, month, day) {
var date = new Date(year,month-1,day)
return date.getDay();
}

this.clearDate = clearDate;
function clearDate() {
dateField.value = ”;
hide();
}

this.setDate = setDate;
function setDate(year, month, day) {
if (dateField) {
if (month < 10) {month = “0” + month;}
if (day < 10) {day = “0” + day;}

var dateString = day+”-“+month+”-“+year;
dateField.value = dateString;
hide();
}
return;

}

this.changeMonth = changeMonth;
function changeMonth(change) {
currentMonth += change;
currentDay = 0;
if(currentMonth > 12) {
currentMonth = 1;
currentYear++;
} else if(currentMonth < 1) {
currentMonth = 12;
currentYear–;
}

calendar = document.getElementById(calendarId);
calendar.innerHTML = calendarDrawTable();

}

this.changeYear = changeYear;
function changeYear(change) {
currentYear += change;
currentDay = 0;
calendar = document.getElementById(calendarId);
calendar.innerHTML = calendarDrawTable();
}

function getCurrentYear() {
var year = new Date().getYear();
if(year < 1900) year += 1900;
return year;
}

function getCurrentMonth() {
return new Date().getMonth() + 1;
}

function getCurrentDay() {
return new Date().getDate();
}

function calendarDrawTable() {

var dayOfMonth = 1;
var validDay = 0;
var startDayOfWeek = getDayOfWeek(currentYear, currentMonth, dayOfMonth);
var daysInMonth = getDaysInMonth(currentYear, currentMonth);
var css_class = null; //CSS class for each day

var table = “<table cellspacing=’0′ cellpadding=’0′ border=’0′>”;
table = table + “<tr class=’header’>”;
table = table + ” <td class=’previous’><a href=’javascript:changeCalendarControlMonth(-1);’>&lt;</a></td>”;
table = table + ” <td colspan=’5′ class=’title’>” + months[currentMonth-1] + ” ” + currentYear + “</td>”;
table = table + ” <td class=’next’><a href=’javascript:changeCalendarControlMonth(1);’>&gt;</a></td>”;
table = table + “</tr>”;
table = table + “<tr><th>D</th><th>S</th><th>T</th><th>Q</th><th>Q</th><th>S</th><th>S</th></tr>”;

for(var week=0; week < 6; week++) {
table = table + “<tr>”;
for(var dayOfWeek=0; dayOfWeek < 7; dayOfWeek++) {
if(week == 0 && startDayOfWeek == dayOfWeek) {
validDay = 1;
} else if (validDay == 1 && dayOfMonth > daysInMonth) {
validDay = 0;
}

if(validDay) {
if (dayOfMonth == selectedDay && currentYear == selectedYear && currentMonth == selectedMonth) {
css_class = ‘current’;
} else if (dayOfWeek == 0 || dayOfWeek == 6) {
css_class = ‘weekend’;
} else {
css_class = ‘weekday’;
}

table = table + “<td><a class='”+css_class+”‘ href=”javascript:setCalendarControlDate(“+currentYear+”,”+currentMonth+”,”+dayOfMonth+”);copyIt()”>”+dayOfMonth+”</a></td>”;
dayOfMonth++;
} else {
table = table + “<td class=’empty’>&nbsp;</td>”;
}
}
table = table + “</tr>”;
}
return table;

}

this.show = show;
function show(field) {
can_hide = 0;

if (dateField == field) {
return;
} else {
dateField = field;
}

if(dateField) {
try {
var dateString = new String(dateField.value);
var dateParts = dateString.split(“-“);

selectedMonth = parseInt(dateParts[1],10);
selectedDay = parseInt(dateParts[0],10);
selectedYear = parseInt(dateParts[2],10);
} catch(e) {}
}

if (!(selectedYear && selectedMonth && selectedDay)) {
selectedMonth = getCurrentMonth();
selectedDay = getCurrentDay();
selectedYear = getCurrentYear();
}

currentMonth = selectedMonth;
currentDay = selectedDay;
currentYear = selectedYear;

if(document.getElementById){

calendar = document.getElementById(calendarId);

calendar.innerHTML = calendarDrawTable();

setProperty(‘display’, ‘block’);

var fieldPos = new positionInfo(dateField);
var calendarPos = new positionInfo(calendarId);

var x = fieldPos.getElementLeft();
var y = fieldPos.getElementBottom();

setProperty(‘left’, x + “px”);
setProperty(‘top’, y + “px”);

if (document.all) {
setElementProperty(‘display’, ‘block’, ‘CalendarControlIFrame’);
setElementProperty(‘left’, x + “px”, ‘CalendarControlIFrame’);
setElementProperty(‘top’, y + “px”, ‘CalendarControlIFrame’);
setElementProperty(‘width’, calendarPos.getElementWidth() + “px”, ‘CalendarControlIFrame’);
setElementProperty(‘height’, calendarPos.getElementHeight() + “px”, ‘CalendarControlIFrame’);
}
}

}

this.hide = hide;
function hide() {
if(dateField) {
setProperty(‘display’, ‘none’);
setElementProperty(‘display’, ‘none’, ‘CalendarControlIFrame’);
dateField = null;
}
}

this.visible = visible;
function visible() {
return dateField
}

this.can_hide = can_hide;
var can_hide = 0;
}

var calendarControl = new CalendarControl();
//—————————————————————
function showCalendarControl(textField) {
// textField.onblur = hideCalendarControl;
calendarControl.show(textField);
}
//—————————————————————
function clearCalendarControl() {
calendarControl.clearDate();
}
//—————————————————————
function hideCalendarControl() {
if (calendarControl.visible()) {
calendarControl.hide();
}
}
//—————————————————————
function setCalendarControlDate(year, month, day) {
calendarControl.setDate(year, month, day);
}
//—————————————————————
function changeCalendarControlYear(change) {
calendarControl.changeYear(change);
}
//—————————————————————
function changeCalendarControlMonth(change) {
calendarControl.changeMonth(change);
}

document.write(“<iframe id=’CalendarControlIFrame’ src=’javascript:false;’ frameBorder=’0′ scrolling=’no’></iframe>”);
document.write(“<div id=’CalendarControl’></div>”);

Also in #JavaScript _↴