JavaScript calendar date picker

We are going to discus about JavaScript calendar date picker. We have used basic JavaScript date picker functionality.

JavaScript Datepicker Test

JavaScript calendar date picker

We are going to discus about JavaScript calendar date picker. We have used basic JavaScript date picker functionality. We use drop-down calendar to be user at the click on select button so you can easily choose date and display into text Field. We have used extra functionality.

  • We use display current month.
  • You can easily Change of date  year and month format.
  • We use additional style information for the cell that holds a highlighted day (usually either today's date or the current date field value.
  • We use a table cell that holds a highlighted day (usually either today's date or the current date field value).

We can easily Change of  date Format like as.

var defaultDateSeparator = "/"; // common values would be "/" or "."
var defaultDateFormat = "ymd" // valid values are "mdy", "dmy", and "ymd"

Example

<html>
<head>
<title>JavaScript Datepicker Test</title>
<script language=JavaScript>
var datePickerDivID = "datepicker";
var iFrameDivID = "datepickeriframe";
var dayArrayShort = new Array('Su', 'Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa');
var dayArrayMed = new Array('Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat');
var dayArrayLong = new Array('Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday');
var monthArrayShort = new Array('Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec');
var monthArrayMed = new Array('Jan', 'Feb', 'Mar', 'Apr', 'May', 'June', 'July', 'Aug', 'Sept', 'Oct', 'Nov', 'Dec');
var monthArrayLong = new Array('January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December');
var defaultDateSeparator = "/"; // common values would be "/" or "-"
var defaultDateFormat = "ymd" // valid values are "mdy", "dmy", and "ymd"
var dateSeparator = defaultDateSeparator;
var dateFormat = defaultDateFormat;
function displayDatePicker(dateFieldName, displayBelowThisObject, dtFormat, dtSep)
{
var targetDateField = document.getElementsByName (dateFieldName).item(0);

// if we weren't told what node to display the datepicker beneath, just display it
// beneath the date field we're updating
if (!displayBelowThisObject)
displayBelowThisObject = targetDateField;

// if a date separator character was given, update the dateSeparator variable
if (dtSep)
dateSeparator = dtSep;
else
dateSeparator = defaultDateSeparator;

// if a date format was given, update the dateFormat variable
if (dtFormat)
dateFormat = dtFormat;
else
dateFormat = defaultDateFormat;

var x = displayBelowThisObject.offsetLeft;
var y = displayBelowThisObject.offsetTop + displayBelowThisObject.offsetHeight ;

// deal with elements inside tables and such
var parent = displayBelowThisObject;
while (parent.offsetParent) {
parent = parent.offsetParent;
x += parent.offsetLeft;
y += parent.offsetTop ;
}

drawDatePicker(targetDateField, x, y);
}

function drawDatePicker(targetDateField, x, y)
{
var dt = getFieldDate(targetDateField.value );

if (!document.getElementById(datePickerDivID)) {
var newNode = document.createElement("div");
newNode.setAttribute("id", datePickerDivID);
newNode.setAttribute("class", "dpDiv");
newNode.setAttribute("style", "visibility: hidden;");
document.body.appendChild(newNode);
}
// move the datepicker div to the proper x,y coordinate and toggle the visiblity
var pickerDiv = document.getElementById(datePickerDivID);
pickerDiv.style.position = "absolute";
pickerDiv.style.left = x + "px";
pickerDiv.style.top = y + "px";
pickerDiv.style.visibility = (pickerDiv.style.visibility == "visible" ? "hidden" : "visible");
pickerDiv.style.display = (pickerDiv.style.display == "block" ? "none" : "block");
pickerDiv.style.zIndex = 10000;

// draw the datepicker table
refreshDatePicker(targetDateField.name, dt.getFullYear(), dt.getMonth(), dt.getDate());
}
/**
This is the function that actually draws the datepicker calendar.
*/
function refreshDatePicker(dateFieldName, year, month, day)
{
// if no arguments are passed, use today's date; otherwise, month and year
// are required (if a day is passed, it will be highlighted later)
var thisDay = new Date();

if ((month >= 0) && (year > 0)) {
thisDay = new Date(year, month, 1);
} else {
day = thisDay.getDate();
thisDay.setDate(1);
}

var crlf = "\r\n";
var TABLE = "<table cols=7 class='dpTable'>" + crlf;
var xTABLE = "</table>" + crlf;
var TR = "<tr class='dpTR'>";
var TR_title = "<tr class='dpTitleTR'>";
var TR_days = "<tr class='dpDayTR'>";
var TR_todaybutton = "<tr class='dpTodayButtonTR'>";
var xTR = "</tr>" + crlf;
var TD = "<td class='dpTD' onMouseOut='this.className=\"dpTD\";' onMouseOver=' this.className=\"dpTDHover\";' "; // leave this tag open, because we'll be adding an onClick event
var TD_title = "<td colspan=5 class='dpTitleTD'>";
var TD_buttons = "<td class='dpButtonTD'>";
var TD_todaybutton = "<td colspan=7 class='dpTodayButtonTD'>";
var TD_days = "<td class='dpDayTD'>";
var TD_selected = "<td class='dpDayHighlightTD' onMouseOut='this.className=\"dpDayHighlightTD\";' onMouseOver='this.className=\"dpTDHover\";' "; // leave this tag open, because we'll be adding an onClick event
var xTD = "</td>" + crlf;
var DIV_title = "<div class='dpTitleText'>";
var DIV_selected = "<div class='dpDayHighlight'>";
var xDIV = "</div>";

// start generating the code for the calendar table
var html = TABLE;

// this is the title bar, which displays the month and the buttons to
// go back to a previous month or forward to the next month
html += TR_title;
html += TD_buttons + getButtonCode(dateFieldName, thisDay, -1, "&lt;") + xTD;
html += TD_title + DIV_title + monthArrayLong[ thisDay.getMonth()] + " " + thisDay.getFullYear() + xDIV + xTD;
html += TD_buttons + getButtonCode(dateFieldName, thisDay, 1, "&gt;") + xTD;
html += xTR;

// this is the row that indicates which day of the week we're on
html += TR_days;
for(i = 0; i < dayArrayShort.length; i++)
html += TD_days + dayArrayShort[i] + xTD;
html += xTR;

// now we'll start populating the table with days of the month
html += TR;

// first, the leading blanks
for (i = 0; i < thisDay.getDay(); i++)
html += TD + "&nbsp;" + xTD;

// now, the days of the month
do {
dayNum = thisDay.getDate();
TD_onclick = " onclick=\"updateDateField('" + dateFieldName + "', '" + getDateString(thisDay) + "');\">";

if (dayNum == day)
html += TD_selected + TD_onclick + DIV_selected + dayNum + xDIV + xTD;
else
html += TD + TD_onclick + dayNum + xTD;

// if this is a Saturday, start a new row
if (thisDay.getDay() == 6)
html += xTR + TR;

// increment the day
thisDay.setDate(thisDay.getDate() + 1);
} while (thisDay.getDate() > 1)

// fill in any trailing blanks
if (thisDay.getDay() > 0) {
for (i = 6; i > thisDay.getDay(); i--)
html += TD + "&nbsp;" + xTD;
}
html += xTR;

// add a button to allow the user to easily return to today, or close the calendar
var today = new Date();
var todayString = "Today is " + dayArrayMed[today.getDay()] + ", " + monthArrayMed[ today.getMonth()] + " " + today.getDate();
html += TR_todaybutton + TD_todaybutton;
html += "<button class='dpTodayButton' onClick='refreshDatePicker(\"" + dateFieldName + "\");'>this month</button> ";
html += "<button class='dpTodayButton' onClick='updateDateField(\"" + dateFieldName + "\");'>close</button>";
html += xTD + xTR;

// and finally, close the table
html += xTABLE;
document.getElementById(datePickerDivID).innerHTML = html;
// add an "iFrame shim" to allow the datepicker to display above selection lists
adjustiFrame();
}
/**
Convenience function for writing the code for the buttons that bring us back or forward
a month.
*/
function getButtonCode(dateFieldName, dateVal, adjust, label)
{
var newMonth = (dateVal.getMonth () + adjust) % 12;
var newYear = dateVal.getFullYear() + parseInt((dateVal.getMonth() + adjust) / 12);
if (newMonth < 0) {
newMonth += 12;
newYear += -1;
}

return "<button class='dpButton' onClick='refreshDatePicker(\"" + dateFieldName + "\", " + newYear + ", " + newMonth + ");'>" + label + "</button>";
}
/**
Convert a JavaScript Date object to a string, based on the dateFormat and dateSeparator
variables at the beginning of this script library.
*/
function getDateString(dateVal)
{
var dayString = "00" + dateVal.getDate();
var monthString = "00" + (dateVal.getMonth()+1);
dayString = dayString.substring(dayString.length - 2);
monthString = monthString.substring(monthString.length - 2);

switch (dateFormat) {
case "dmy" :
return dayString + dateSeparator + monthString + dateSeparator + dateVal.getFullYear();
case "ymd" :
return dateVal.getFullYear() + dateSeparator + monthString + dateSeparator + dayString;
case "mdy" :
default :
return monthString + dateSeparator + dayString + dateSeparator + dateVal.getFullYear();
}
}
/**
Convert a string to a JavaScript Date object.
*/
function getFieldDate(dateString)
{
var dateVal;
var dArray;
var d, m, y;

try {
dArray = splitDateString(dateString);
if (dArray) {
switch (dateFormat) {
case "dmy" :
d = parseInt(dArray[0], 10);
m = parseInt(dArray[1], 10) - 1;
y = parseInt(dArray[2], 10);
break;
case "ymd" :
d = parseInt(dArray[2], 10);
m = parseInt(dArray[1], 10) - 1;
y = parseInt(dArray[0], 10);
break;
case "mdy" :
default :
d = parseInt(dArray[1], 10);
m = parseInt(dArray[0], 10) - 1;
y = parseInt(dArray[2], 10);
break;
}
dateVal = new Date(y, m, d);
} else if (dateString) {
dateVal = new Date(dateString);
} else {
dateVal = new Date();
}
} catch(e) {
dateVal = new Date();
}

return dateVal;
}
/**
Try to split a date string into an array of elements, using common date separators.
If the date is split, an array is returned; otherwise, we just return false.
*/
function splitDateString(dateString)
{
var dArray;
if (dateString.indexOf("/") >= 0)
dArray = dateString.split("/");
else if (dateString.indexOf(".") >= 0)
dArray = dateString.split(".");
else if (dateString.indexOf("-") >= 0)
dArray = dateString.split("-");
else if (dateString.indexOf("\\") >= 0)
dArray = dateString.split("\\");
else
dArray = false;

return dArray;
}

function updateDateField(dateFieldName, dateString)
{
var targetDateField = document.getElementsByName (dateFieldName).item(0);
if (dateString)
targetDateField.value = dateString;

var pickerDiv = document.getElementById(datePickerDivID);
pickerDiv.style.visibility = "hidden";
pickerDiv.style.display = "none";

adjustiFrame();
targetDateField.focus();

if ((dateString) && (typeof(datePickerClosed) == "function"))
datePickerClosed(targetDateField);
}
function adjustiFrame(pickerDiv, iFrameDiv)
{
var is_opera = (navigator.userAgent.toLowerCase().indexOf("opera") != -1);
if (is_opera)
return;

// put a try/catch block around the whole thing, just in case
try {
if (!document.getElementById(iFrameDivID)) {
var newNode = document.createElement("iFrame");
newNode.setAttribute("id", iFrameDivID);
newNode.setAttribute("src", "javascript:false;");
newNode.setAttribute("scrolling", "no");
newNode.setAttribute ("frameborder", "0");
document.body.appendChild(newNode);
}

if (!pickerDiv)
pickerDiv = document.getElementById(datePickerDivID);
if (!iFrameDiv)
iFrameDiv = document.getElementById(iFrameDivID);

try {
iFrameDiv.style.position = "absolute";
iFrameDiv.style.width = pickerDiv.offsetWidth;
iFrameDiv.style.height = pickerDiv.offsetHeight ;
iFrameDiv.style.top = pickerDiv.style.top;
iFrameDiv.style.left = pickerDiv.style.left;
iFrameDiv.style.zIndex = pickerDiv.style.zIndex - 1;
iFrameDiv.style.visibility = pickerDiv.style.visibility ;
iFrameDiv.style.display = pickerDiv.style.display;
} catch(e) {
}

} catch (ee) {
}

}
</script>

<style>
body {
font-family: Verdana, Tahoma, Arial, Helvetica, sans-serif;
font-size: .8em;
}
/* the div that holds the date picker calendar */
.dpDiv {
}
/* the table (within the div) that holds the date picker calendar */
.dpTable {
font-family: Tahoma, Arial, Helvetica, sans-serif;
font-size: 12px;
text-align: center;
color: #505050;
background-color: #ece9d8;
border: 1px solid #AAAAAA;
}
/* a table row that holds date numbers (either blank or 1-31) */
.dpTR {
}
/* the top table row that holds the month, year, and forward/backward buttons */
.dpTitleTR {
}
/* the second table row, that holds the names of days of the week (Mo, Tu, We, etc.) */
.dpDayTR {
}
/* the bottom table row, that has the "This Month" and "Close" buttons */
.dpTodayButtonTR {
}
/* a table cell that holds a date number (either blank or 1-31) */
.dpTD {
border: 1px solid #ece9d8;
}
/* a table cell that holds a highlighted day (usually either today's date or the current date field value) */
.dpDayHighlightTD {
background-color: #CCCCCC;
border: 1px solid #AAAAAA;
}
/* the date number table cell that the mouse pointer is currently over (you can use contrasting colors to make it apparent which cell is being hovered over) */
.dpTDHover {
background-color: #aca998;
border: 1px solid #888888;
cursor: pointer;
color: red;
}
/* the table cell that holds the name of the month and the year */
.dpTitleTD {
}
/* a table cell that holds one of the forward/backward buttons */
.dpButtonTD {
}
/* the table cell that holds the "This Month" or "Close" button at the bottom */
.dpTodayButtonTD {
}
/* a table cell that holds the names of days of the week (Mo, Tu, We, etc.) */
.dpDayTD {
background-color: #CCCCCC;
border: 1px solid #AAAAAA;
color: white;
}
/* additional style information for the text that indicates the month and year */
.dpTitleText {
font-size: 12px;
color: gray;
font-weight: bold;
}
/* additional style information for the cell that holds a highlighted day (usually either today's date or the current date field value) */ 
.dpDayHighlight {
color: 4060ff;
font-weight: bold;
}
/* the forward/backward buttons at the top */
.dpButton {
font-family: Verdana, Tahoma, Arial, Helvetica, sans-serif;
font-size: 10px;
color: gray;
background: #d8e8ff;
font-weight: bold;
padding: 0px;
}
/* the "This Month" and "Close" buttons at the bottom */
.dpTodayButton {
font-family: Verdana, Tahoma, Arial, Helvetica, sans-serif;
font-size: 10px;
color: gray;
background: #d8e8ff;
font-weight: bold;
}

</style>
</head>
<body>
<h2>JavaScript Date Picker Test</h2>
<form>
<table>
<tr>
<td>To Date</td>
<td><input name="ADate"></td>
<td><input type=button value="select" onclick="displayDatePicker('ADate');"></td>
</tr>

<tr>
<td>From Date</td>
<td> <input name="AnotherDate"></td>
<td><input type=button value="select" onclick="displayDatePicker('AnotherDate', this);"></td>
</tr>
</table>
</form>
</body>
</html>

Output:-

Download Source Code

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JavaScript calendar date picker

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