Calendar (IE only) : Calendar « GUI Components « JavaScript DHTML






Calendar (IE only)

 
<!-- 
     Example File From "JavaScript and DHTML Cookbook"
     Published by O'Reilly & Associates
     Copyright 2003 Danny Goodman
-->
 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html>
<head>
<title>JavaScript Date Picker</title>
<style rel="stylesheet" id="mainStyle" type="text/css" >
html {background-color:#cccccc}
body {background-color:#eeeeee; font-family:Tahoma,Arial,Helvetica,sans-serif; font-size:12px;
    margin-left:15%; margin-right:15%; border:3px groove darkred; padding:15px}
h1 {text-align:right; font-size:1.5em; font-weight:bold}
h2 {text-align:left; font-size:1.1em; font-weight:bold; text-decoration:underline}
.buttons {margin-top:10px}

</style>
<style type="text/css">
#calendar {position:absolute; 
           left:0px; 
           top:0px; 
           visibility:hidden
          }
table {font-family:Verdana, Arial, Helvetica, sans-serif; 
       background-color:#999999
      }
th {background-color:#ccffcc; 
    text-align:center; 
    font-size:10px; 
    width:26px
   }
#tableHeader {background-color:#ffcccc; 
              width:100%
             }
td {background-color:#ffffcc; 
    text-align:center; 
    font-size:10px
   }
#tableBody tr td {width:26px}
#today {background-color:#ffcc33}
a:link {color:#000000; text-decoration:none}
a:active {color:#000000; text-decoration:none}
a:visited {color:#000000; text-decoration:none}
a:hover {color:#990033; text-decoration:underline}
</style>
<script type="text/javascript">
/* ***********************************************************
Example 4-3 (DHTMLAPI.js)
"Dynamic HTML:The Definitive Reference"
2nd Edition
by Danny Goodman
Published by O'Reilly & Associates  ISBN 1-56592-494-0
http://www.oreilly.com
Copyright 2002 Danny Goodman.  All Rights Reserved.
************************************************************ */
// DHTMLapi.js custom API for cross-platform
// object positioning by Danny Goodman (http://www.dannyg.com).
// Release 2.0. Supports NN4, IE, and W3C DOMs.

// Global variables
var isCSS, isW3C, isIE4, isNN4, isIE6CSS;
// Initialize upon load to let all browsers establish content objects
function initDHTMLAPI() {
    if (document.images) {
        isCSS = (document.body && document.body.style) ? true : false;
        isW3C = (isCSS && document.getElementById) ? true : false;
        isIE4 = (isCSS && document.all) ? true : false;
        isNN4 = (document.layers) ? true : false;
        isIE6CSS = (document.compatMode && document.compatMode.indexOf("CSS1") >= 0) ? true : false;
    }
}
// Set event handler to initialize API
window.onload = initDHTMLAPI;

// Seek nested NN4 layer from string name
function seekLayer(doc, name) {
    var theObj;
    for (var i = 0; i < doc.layers.length; i++) {
        if (doc.layers[i].name == name) {
            theObj = doc.layers[i];
            break;
        }
        // dive into nested layers if necessary
        if (doc.layers[i].document.layers.length > 0) {
            theObj = seekLayer(document.layers[i].document, name);
        }
    }
    return theObj;
}

// Convert object name string or object reference
// into a valid element object reference
function getRawObject(obj) {
    var theObj;
    if (typeof obj == "string") {
        if (isW3C) {
            theObj = document.getElementById(obj);
        } else if (isIE4) {
            theObj = document.all(obj);
        } else if (isNN4) {
            theObj = seekLayer(document, obj);
        }
    } else {
        // pass through object reference
        theObj = obj;
    }
    return theObj;
}

// Convert object name string or object reference
// into a valid style (or NN4 layer) reference
function getObject(obj) {
    var theObj = getRawObject(obj);
    if (theObj && isCSS) {
        theObj = theObj.style;
    }
    return theObj;
}

// Position an object at a specific pixel coordinate
function shiftTo(obj, x, y) {
    var theObj = getObject(obj);
    if (theObj) {
        if (isCSS) {
            // equalize incorrect numeric value type
            var units = (typeof theObj.left == "string") ? "px" : 0 
            theObj.left = x + units;
            theObj.top = y + units;
        } else if (isNN4) {
            theObj.moveTo(x,y)
        }
    }
}

// Move an object by x and/or y pixels
function shiftBy(obj, deltaX, deltaY) {
    var theObj = getObject(obj);
    if (theObj) {
        if (isCSS) {
            // equalize incorrect numeric value type
            var units = (typeof theObj.left == "string") ? "px" : 0 
            theObj.left = getObjectLeft(obj) + deltaX + units;
            theObj.top = getObjectTop(obj) + deltaY + units;
        } else if (isNN4) {
            theObj.moveBy(deltaX, deltaY);
        }
    }
}

// Set the z-order of an object
function setZIndex(obj, zOrder) {
    var theObj = getObject(obj);
    if (theObj) {
        theObj.zIndex = zOrder;
    }
}

// Set the background color of an object
function setBGColor(obj, color) {
    var theObj = getObject(obj);
    if (theObj) {
        if (isNN4) {
            theObj.bgColor = color;
        } else if (isCSS) {
            theObj.backgroundColor = color;
        }
    }
}

// Set the visibility of an object to visible
function show(obj) {
    var theObj = getObject(obj);
    if (theObj) {
        theObj.visibility = "visible";
    }
}

// Set the visibility of an object to hidden
function hide(obj) {
    var theObj = getObject(obj);
    if (theObj) {
        theObj.visibility = "hidden";
    }
}

// Retrieve the x coordinate of a positionable object
function getObjectLeft(obj)  {
    var elem = getRawObject(obj);
    var result = 0;
    if (document.defaultView) {
        var style = document.defaultView;
        var cssDecl = style.getComputedStyle(elem, "");
        result = cssDecl.getPropertyValue("left");
    } else if (elem.currentStyle) {
        result = elem.currentStyle.left;
    } else if (elem.style) {
        result = elem.style.left;
    } else if (isNN4) {
        result = elem.left;
    }
    return parseInt(result);
}

// Retrieve the y coordinate of a positionable object
function getObjectTop(obj)  {
    var elem = getRawObject(obj);
    var result = 0;
    if (document.defaultView) {
        var style = document.defaultView;
        var cssDecl = style.getComputedStyle(elem, "");
        result = cssDecl.getPropertyValue("top");
    } else if (elem.currentStyle) {
        result = elem.currentStyle.top;
    } else if (elem.style) {
        result = elem.style.top;
    } else if (isNN4) {
        result = elem.top;
    }
    return parseInt(result);
}

// Retrieve the rendered width of an element
function getObjectWidth(obj)  {
    var elem = getRawObject(obj);
    var result = 0;
    if (elem.offsetWidth) {
        result = elem.offsetWidth;
    } else if (elem.clip && elem.clip.width) {
        result = elem.clip.width;
    } else if (elem.style && elem.style.pixelWidth) {
        result = elem.style.pixelWidth;
    }
    return parseInt(result);
}

// Retrieve the rendered height of an element
function getObjectHeight(obj)  {
    var elem = getRawObject(obj);
    var result = 0;
    if (elem.offsetHeight) {
        result = elem.offsetHeight;
    } else if (elem.clip && elem.clip.height) {
        result = elem.clip.height;
    } else if (elem.style && elem.style.pixelHeight) {
        result = elem.style.pixelHeight;
    }
    return parseInt(result);
}

// Return the available content width space in browser window
function getInsideWindowWidth() {
    if (window.innerWidth) {
        return window.innerWidth;
    } else if (isIE6CSS) {
        // measure the html element's clientWidth
        return document.body.parentElement.clientWidth
    } else if (document.body && document.body.clientWidth) {
        return document.body.clientWidth;
    }
    return 0;
}

// Return the available content height space in browser window
function getInsideWindowHeight() {
    if (window.innerHeight) {
        return window.innerHeight;
    } else if (isIE6CSS) {
        // measure the html element's clientHeight
        return document.body.parentElement.clientHeight
    } else if (document.body && document.body.clientHeight) {
        return document.body.clientHeight;
    }
    return 0;
}



</script>
<script type="text/javascript">
/*******************
  UTILITY FUNCTIONS
********************/
// day of week of month's first day
function getFirstDay(theYear, theMonth){
    var firstDate = new Date(theYear,theMonth,1);
    return firstDate.getDay();
}
// number of days in the month
function getMonthLen(theYear, theMonth) {
    var nextMonth = new Date(theYear, theMonth + 1, 1);
    nextMonth.setHours(nextMonth.getHours() - 3);
    return nextMonth.getDate();
}

function getElementPosition(elemID) {
  var offsetTrail = document.getElementById(elemID);
    var offsetLeft = 0;
    var offsetTop = 0;
    while (offsetTrail) {
        offsetLeft += offsetTrail.offsetLeft;
        offsetTop += offsetTrail.offsetTop;
        offsetTrail = offsetTrail.offsetParent;
    }
    if (navigator.userAgent.indexOf("Mac") != -1 && 
        typeof document.body.leftMargin != "undefined") {
        offsetLeft += document.body.leftMargin;
        offsetTop += document.body.topMargin;
    }
    return {left:offsetLeft, top:offsetTop};
}

// position and show calendar
function showCalendar(evt) {
    evt = (evt) ? evt : event;
    if (evt) {
      if (document.getElementById("calendar").style.visibility != "visible") {
          var elem = (evt.target) ? evt.target : evt.srcElement;
          var position = getElementPosition(elem.id);
            shiftTo("calendar", position.left + elem.offsetWidth, position.top);
            show("calendar");
        } else {
            hide("calendar");
        }
    }
}

/************************
  DRAW CALENDAR CONTENTS
*************************/
// clear and re-populate table based on form's selections
function populateTable(form) {
    // pick up date form choices
    var theMonth = form.chooseMonth.selectedIndex;
    var theYear = parseInt(form.chooseYear.options[form.chooseYear.selectedIndex].text);
    // initialize date-dependent variables
    var firstDay = getFirstDay(theYear, theMonth);
    var howMany = getMonthLen(theYear, theMonth);
    var today = new Date();
    
    // fill in month/year in table header
    document.getElementById("tableHeader").innerHTML = 
        form.chooseMonth.options[theMonth].text + " " + theYear;
    
    // initialize vars for table creation
    var dayCounter = 1;
    var TBody = document.getElementById("tableBody");
    // clear any existing rows
    while (TBody.rows.length > 0) {
        TBody.deleteRow(0);
    }
    var newR, newC, dateNum;
    var done=false;
    while (!done) {
        // create new row at end
        newR = TBody.insertRow(TBody.rows.length);
        if (newR) {
            for (var i = 0; i < 7; i++) {
                // create new cell at end of row
                newC = newR.insertCell(newR.cells.length);
                if (TBody.rows.length == 1 && i < firstDay) {
                    // empty boxes before first day
                    newC.innerHTML = "&nbsp;";
                    continue;
                }
                if (dayCounter == howMany) {
                    // no more rows after this one
                    done = true;
                }
                // plug in link/date (or empty for boxes after last day)
                if (dayCounter <= howMany) {
                    if (today.getFullYear() == theYear &&
                        today.getMonth() == form.chooseMonth.selectedIndex &&
                        today.getDate() == dayCounter) {
                        newC.id = "today";
                    }
                    newC.innerHTML = "<a href='#'onclick='chooseDate(" +
                        dayCounter + "," + theMonth + "," + theYear + 
                        "); return false;'>" + dayCounter + "</a>";
                     dayCounter++;
               } else {
                    newC.innerHTML = "&nbsp;";
                }
            }
        } else {
            done = true;
        }
    }
}

/*******************
  INITIALIZATIONS
********************/
// create dynamic list of year choices
function fillYears() {
    var today = new Date();
    var thisYear = today.getFullYear();
    var yearChooser = document.dateChooser.chooseYear;
    for (i = thisYear; i < thisYear + 5; i++) {
        yearChooser.options[yearChooser.options.length] = new Option(i, i);
    }
    setCurrMonth(today);
}
// set month choice to current month
function setCurrMonth(today) {
    document.dateChooser.chooseMonth.selectedIndex = today.getMonth();
}

/*******************
   PROCESS CHOICE
********************/
function chooseDate(date, month, year) {
    document.mainForm.date.value = date;
    document.mainForm.month.value = month + 1;
    document.mainForm.year.value = year;
    hide("calendar");
}

</script>
</head>

<body onload="fillYears(); populateTable(document.dateChooser); initDHTMLAPI()">


<h1>Date Picker</h1>
<hr />

<form name="mainForm" id="mainForm" method="POST" action="">
<p>Enter a date:</p>
<p>mm:<input type="text" name="month" id="month" size="3" maxlength="2" value="1"> 
dd:<input type="text" name="date" id="date" size="3" maxlength="2" value="1"> 
yyyy:<input type="text" name="year" id="year" size="5" maxlength="4" value="2003">
<input type="button" id="showit" value="Pick Date >>" onclick="showCalendar(event)">
</p>
</form>


<div id="calendar">
<table id="calendarTable" border=1>
<tr>
    <th id="tableHeader" colspan="7"></th>
</tr>
<tr><th>Sun</th><th>Mon</th><th>Tue</th><th>Wed</th>
<th>Thu</th><th>Fri</th><th>Sat</th></tr>
<tbody id="tableBody"></tbody>
<tr>
    <td colspan="7">
    <p>
    <form name="dateChooser">
        <select name="chooseMonth" 
        onchange="populateTable(this.form)">
            <option selected>January<option>February
            <option>March<option>April<option>May
            <option>June<option>July<option>August
            <option>September<option>October
            <option>November<option>December
    </select>
    <select name="chooseYear" onchange="populateTable(this.form)">
    </select>
    </form>
    </p>
    </td>
</tr>
</table>
</div>

</body>
</html>

           
         
  








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