計算你的出生日在星期幾

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-- 網頁特效 (http://www.webasp.net/javascript/)
--- 計算你的出生日在星期幾 (http://www.webasp.net/javascript/1/136.htm)
-- 發佈日期： 2004-06-05
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<!-- 要實現此效果需要 2 個步驟： -->

<!-- 第 1 步： -->
<!-- 把下面的代碼加到<HEAD></HEAD>區域中： -->

><script LANGUAGE="JavaScript">

<!--

function cala_day(form) {

var nSwitch = 0
var nMonth = parseInt(form.month.value)
var nDay = parseInt(form.day.value)
var nYear = parseInt(form.year.value)

if(!(nYear % 4) && (nMonth > 2)) {
nSwitch = 1
}

var nDayOfWeek = cala_weekday(nMonth, nDay, nYear)

if(nSwitch) {
nDayOfWeek++
nSwitch = 0
}

day_display(form, nDayOfWeek)
}

function cala_weekday( x_nMonth, x_nDay, x_nYear) {

if(x_nMonth >= 3){
x_nMonth -= 2
}
else {
x_nMonth += 10
}

if( (x_nMonth == 11) || (x_nMonth == 12) ){
x_nYear--
}

var nCentNum = parseInt(x_nYear / 100)
var nDYearNum = x_nYear % 100

var nPart1 = parseInt(2.6 * x_nMonth - .2)

var nZeller = (parseInt(nPart1 + x_nDay + nDYearNum + (nDYearNum / 4) + (nCentNum / 4) - 2 * nCentNum)) % 7

if(nZeller < 0){
nZeller += 7
}

return nZeller
}

function day_display(form, x_nDayOfWeek) {

if(x_nDayOfWeek == 0) {
form.birthday.value = "Saturday"
return
}
if(x_nDayOfWeek == 1) {
form.birthday.value = "Sunday"
return
}
if(x_nDayOfWeek == 2) {
form.birthday.value = "Monday"
return
}
if(x_nDayOfWeek == 3) {
form.birthday.value = "Tuesday"
return
}
if(x_nDayOfWeek == 4) {
form.birthday.value = "Wednesday"
return
}
if(x_nDayOfWeek == 5) {
form.birthday.value = "Thursday"
return
}
if(x_nDayOfWeek == 6) {
form.birthday.value = "Friday"
return
}

form.birthday.value = "Not a valid date."
}
//-->

</script>



<!-- 第 2 步： -->
<!-- 把下面的代碼加到<BODY></BODY>區域中： -->

<table WIDTH="96%" BORDER="0" CELLSPACING="5" CELLPADDING="5">
<tr>
<td WIDTH="100%">
<p>To use this algorithm, input your date of birth (MM/DD/YYYY), press &quot;ok&quot; and
then <i>boom</i> the day of the week in which you were born on appears. </p>
<form>
<div align="center"><center><table WIDTH="225" BORDER="1" ALIGN="CENTER">
<tr>
<td WIDTH="250" COLSPAN="2" ALIGN="center" bgcolor="#0000FF"></font><font SIZE="-1"
color="#FFFFFF" FACE="ARIEL,HELVETICA"><b>Zeller's Algorithm</b></font><font
FACE="ARIEL,HELVETICA" SIZE="-1"></td>
</tr>
<tr>
<td WIDTH="100" bgcolor="#FF0000"><font color="#FFFF00"><font SIZE="2"><b>Month:</b><input
TYPE="Text" NAME="month" SIZE="4"><br>
<br>
<b>Day:</b><input TYPE="Text" NAME="day" SIZE="4"><br>
<br>
<b>Year:</b><input TYPE="Text" NAME="year" SIZE="4"></font> </font></td>
<td WIDTH="125" ALIGN="center" bgcolor="#FF0000"><font color="#FFFF00"><br>
<font SIZE="2"><b>Example:</b></font> <br>
<font SIZE="2"><i><b>11-1-1970</b><br>
<b>Sunday</b></i><br>
<br>
<b>Your were born on a</b></font> <br>
<input TYPE="Text" NAME="birthday" SIZE="10"> </font></td>
</tr>
<tr>
<td COLSPAN="2" ALIGN="center" bgcolor="#0000FF"><input TYPE="button" VALUE="OK"
ONCLICK="cala_day(this.form)"><input TYPE="reset"></font></td>
</tr>
</table>
</center></div>
</form>
</td>
</tr>
</table>

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