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Wochentag berechnen
Sourcecode:
<head>
<script language="JavaScript">
function MakeArray(n) {
this.length = n;
for (var i = 1; i <=n; i++) {
this[i] = 0;
}
}
days = new MakeArray(7);
days[0] = "Samstag"
days[1] = "Sonntag"
days[2] = "Montag"
days[3] = "Dienstag"
days[4] = "Mittwoch"
days[5] = "Donnerstag"
days[6] = "Freitag"
months = new MakeArray(12);
months[1] = "Januar"
months[2] = "Februar"
months[3] = "Maerz"
months[4] = "April"
months[5] = "Mai"
months[6] = "Juni"
months[7] = "Juli"
months[8] = "August"
months[9] = "September"
months[10] = "Oktober"
months[11] = "November"
months[12] = "Dezember"
function compute(form) {
var val1 = parseInt(form.day.value, 10)
if ((val1 < 0) || (val1 > 31)) {
alert("Sind das nicht zu viele Tage?")
}
var val2 = parseInt(form.month.value, 10)
if ((val2 < 0) || (val2 > 12)) {
alert("Seit wann hat das Jahr mehr als 12 Monate ?")
}
var val2x = parseInt(form.month.value, 10)
var val3 = parseInt(form.year.value, 10)
if (val3 < 1900) {
alert("Bist Du doch schon so alt ?")
}
if (val2 == 1) {
val2x = 13;
val3 = val3-1
}
if (val2 == 2) {
val2x = 14;
val3 = val3-1
}
var val4 = parseInt(((val2x+1)*3)/5, 10)
var val5 = parseInt(val3/4, 10)
var val6 = parseInt(val3/100, 10)
var val7 = parseInt(val3/400, 10)
var val8 = val1+(val2x*2)+val4+val3+val5-val6+val7+2
var val9 = parseInt(val8/7, 10)
var val0 = val8-(val9*7)
form.result1.value =form.day.value+". "+months[val2]+" "+form.year.value
form.result2.value = days[val0]
}
</script>
</head>
<body>
<form method="POST">
<table border="3" width="40%" bgcolor="#BBBBFF" height="170">
<tr>
<td width="50%" height="23"><b>Tag:</b></td>
<td width="50%" height="23"><input type="text" name="day" value="1" size="2"></td>
</tr>
<tr>
<td width="50%" height="23"><b>Monat:</b></td>
<td width="50%" height="23"><input type="text" name="month" value="1" size="2"></td>
</tr>
<tr>
<td width="50%" height="23"><b>Jahr:</b></td>
<td width="50%" height="23"><input type="text" name="year" value="2000" size="4"></td>
</tr>
<tr>
<td width="50%" height="25"><input type="button" value="ausrechnen" onclick="compute(this.form)"></td>
<td width="50%" height="25"><input type="reset" value="zurücksetzen"></td>
</tr>
<tr>
<td width="50%" height="17"><b>Datum:</b></td>
<td width="50%" height="17"><input type="text" name="result1" size="18"></td>
</tr>
<tr>
<td width="50%" height="23"><b>Wochentag:</b></td>
<td width="50%" height="23"><input type="text" name="result2" size="18"></td>
</tr>
</table>
</form>
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