Dynamic Calendar - JavaScript Made Easy: Free JavaScripts Tutorials Example Code

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JavaScript Basics

Inserting Javascript

Complete Tutorial

Advance DHTML Tutorial

Dynamic Calendar

This calendar allows you to select a month and year and automatically display the a complete calendar for that month in Dynamic HTML. Great!

Insert into <HEAD>

<SCRIPT LANGUAGE="JavaScript">

<!-- Begin
var dDate = new Date();
var dCurMonth = dDate.getMonth();
var dCurDayOfMonth = dDate.getDate();
var dCurYear = dDate.getFullYear();
var objPrevElement = new Object();

function fToggleColor(myElement) {
var toggleColor = "#ff0000";
if (myElement.id == "calDateText") {
if (myElement.color == toggleColor) {
myElement.color = "";
} else {
myElement.color = toggleColor;
   }
} else if (myElement.id == "calCell") {
for (var i in myElement.children) {
if (myElement.children[i].id == "calDateText") {
if (myElement.children[i].color == toggleColor) {
myElement.children[i].color = "";
} else {
myElement.children[i].color = toggleColor;
            }
         }
      }
   }
}
function fSetSelectedDay(myElement){
if (myElement.id == "calCell") {
if (!isNaN(parseInt(myElement.children["calDateText"].innerText))) {
myElement.bgColor = "#c0c0c0";
objPrevElement.bgColor = "";
document.all.calSelectedDate.value = parseInt(myElement.children["calDateText"].innerText);
objPrevElement = myElement;
      }
   }
}
function fGetDaysInMonth(iMonth, iYear) {
var dPrevDate = new Date(iYear, iMonth, 0);
return dPrevDate.getDate();
}
function fBuildCal(iYear, iMonth, iDayStyle) {
var aMonth = new Array();
aMonth[0] = new Array(7);
aMonth[1] = new Array(7);
aMonth[2] = new Array(7);
aMonth[3] = new Array(7);
aMonth[4] = new Array(7);
aMonth[5] = new Array(7);
aMonth[6] = new Array(7);
var dCalDate = new Date(iYear, iMonth-1, 1);
var iDayOfFirst = dCalDate.getDay();
var iDaysInMonth = fGetDaysInMonth(iMonth, iYear);
var iVarDate = 1;
var i, d, w;
if (iDayStyle == 2) {
aMonth[0][0] = "Sunday";
aMonth[0][1] = "Monday";
aMonth[0][2] = "Tuesday";
aMonth[0][3] = "Wednesday";
aMonth[0][4] = "Thursday";
aMonth[0][5] = "Friday";
aMonth[0][6] = "Saturday";
} else if (iDayStyle == 1) {
aMonth[0][0] = "Sun";
aMonth[0][1] = "Mon";
aMonth[0][2] = "Tue";
aMonth[0][3] = "Wed";
aMonth[0][4] = "Thu";
aMonth[0][5] = "Fri";
aMonth[0][6] = "Sat";
} else {
aMonth[0][0] = "Su";
aMonth[0][1] = "Mo";
aMonth[0][2] = "Tu";
aMonth[0][3] = "We";
aMonth[0][4] = "Th";
aMonth[0][5] = "Fr";
aMonth[0][6] = "Sa";
}
for (d = iDayOfFirst; d < 7; d++) {
aMonth[1][d] = iVarDate;
iVarDate++;
}
for (w = 2; w < 7; w++) {
for (d = 0; d < 7; d++) {
if (iVarDate <= iDaysInMonth) {
aMonth[w][d] = iVarDate;
iVarDate++;
      }
   }
}
return aMonth;
}
function fDrawCal(iYear, iMonth, iCellWidth, iCellHeight, sDateTextSize, sDateTextWeight, iDayStyle) {
var myMonth;
myMonth = fBuildCal(iYear, iMonth, iDayStyle);
document.write("<table border='1'>")
document.write("<tr>");
document.write("<td align='center' style='FONT-FAMILY:Arial;FONT-SIZE:12px;FONT-WEIGHT: bold'>" + myMonth[0][0] + "</td>");
document.write("<td align='center' style='FONT-FAMILY:Arial;FONT-SIZE:12px;FONT-WEIGHT: bold'>" + myMonth[0][1] + "</td>");
document.write("<td align='center' style='FONT-FAMILY:Arial;FONT-SIZE:12px;FONT-WEIGHT: bold'>" + myMonth[0][2] + "</td>");
document.write("<td align='center' style='FONT-FAMILY:Arial;FONT-SIZE:12px;FONT-WEIGHT: bold'>" + myMonth[0][3] + "</td>");
document.write("<td align='center' style='FONT-FAMILY:Arial;FONT-SIZE:12px;FONT-WEIGHT: bold'>" + myMonth[0][4] + "</td>");
document.write("<td align='center' style='FONT-FAMILY:Arial;FONT-SIZE:12px;FONT-WEIGHT: bold'>" + myMonth[0][5] + "</td>");
document.write("<td align='center' style='FONT-FAMILY:Arial;FONT-SIZE:12px;FONT-WEIGHT: bold'>" + myMonth[0][6] + "</td>");
document.write("</tr>");
for (w = 1; w < 7; w++) {
document.write("<tr>")
for (d = 0; d < 7; d++) {
document.write("<td align='left' valign='top' width='" + iCellWidth + "' height='" + iCellHeight + "' id=calCell style='CURSOR:Hand' onMouseOver='fToggleColor(this)' onMouseOut='fToggleColor(this)' onclick=fSetSelectedDay(this)>");
if (!isNaN(myMonth[w][d])) {
document.write("<font id=calDateText onMouseOver='fToggleColor(this)' style='CURSOR:Hand;FONT-FAMILY:Arial;FONT-SIZE:" + sDateTextSize + ";FONT-WEIGHT:" + sDateTextWeight + "' onMouseOut='fToggleColor(this)' onclick=fSetSelectedDay(this)>" + myMonth[w][d] + "</font>");
} else {
document.write("<font id=calDateText onMouseOver='fToggleColor(this)' style='CURSOR:Hand;FONT-FAMILY:Arial;FONT-SIZE:" + sDateTextSize + ";FONT-WEIGHT:" + sDateTextWeight + "' onMouseOut='fToggleColor(this)' onclick=fSetSelectedDay(this)> </font>");
}
document.write("</td>")
}
document.write("</tr>");
}
document.write("</table>")
}
function fUpdateCal(iYear, iMonth) {
myMonth = fBuildCal(iYear, iMonth);
objPrevElement.bgColor = "";
document.all.calSelectedDate.value = "";
for (w = 1; w < 7; w++) {
for (d = 0; d < 7; d++) {
if (!isNaN(myMonth[w][d])) {
calDateText[((7*w)+d)-7].innerText = myMonth[w][d];
} else {
calDateText[((7*w)+d)-7].innerText = " ";
         }
      }
   }
}
// End -->
</script>

Insert into <BODY>

<script language="JavaScript" for=window event=onload>

</script>

<form name="frmCalendarSample" method="post" action="">
<input type="hidden" name="calSelectedDate" value="">

<table border="1">
<tr>
<td>
<select name="tbSelMonth" onchange='fUpdateCal(frmCalendarSample.tbSelYear.value, frmCalendarSample.tbSelMonth.value)'>
<option value="1">January</option>
<option value="2">February</option>
<option value="3">March</option>
<option value="4">April</option>
<option value="5">May</option>
<option value="6">June</option>
<option value="7">July</option>
<option value="8">August</option>
<option value="9">September</option>
<option value="10">October</option>
<option value="11">November</option>
<option value="12">December</option>
</select>

<select name="tbSelYear" onchange='fUpdateCal(frmCalendarSample.tbSelYear.value, frmCalendarSample.tbSelMonth.value)'>
<option value="1998">1998</option>
<option value="1999">1999</option>
<option value="2000">2000</option>
<option value="2001">2001</option>
<option value="2002">2002</option>
<option value="2003">2003</option>
<option value="2004">2004</option>
</select>
</td>
</tr>
<tr>
<td>
<script language="JavaScript">
var dCurDate = new Date();
fDrawCal(dCurDate.getFullYear(), dCurDate.getMonth()+1, 30, 30, "12px", "bold", 1);
</script>
</td>
</tr>
</table>
</form>

Other Options