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태어난 요일 계산하기 (특정일의 요일 계산)

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<HTML>
<HEAD>
<TITLE>태어난 요일 계산하기 (특정일의 요일 계산)</TITLE>

<!-- <head>태그 안에 다음 스크립트를 삽입한다. -->

<SCRIPT LANGUAGE="JavaScript">
<!-- begin script
//General Array Function
function MakeArray(n) {
this.length = n;
for (var i = 1; i <=n; i++) {
this[i] = 0;
}
}

//Initialize Days of Week Array
days = new MakeArray(7);
days[0] = "토"
days[1] = "일"
days[2] = "월"
days[3] = "화"
days[4] = "수"
days[5] = "목"
days[6] = "금"

//Initialize Months Array
months = new MakeArray(12);
months[1] = "January"
months[2] = "February"
months[3] = "March"
months[4] = "April"
months[5] = "May"
months[6] = "June"
months[7] = "July"
months[8] = "August"
months[9] = "September"
months[10] = "October"
months[11] = "November"
months[12] = "December"

//Day of Week Function
function compute(form) {
var val1 = parseInt(form.day.value, 10)
if ((val1 < 0) || (val1 > 31)) {
alert("Day is out of range")
}
var val2 = parseInt(form.month.value, 10)
if ((val2 < 0) || (val2 > 12)) {
alert("Month is out of range")
}
var val2x = parseInt(form.month.value, 10)
var val3 = parseInt(form.year.value, 10)
if (val3 < 1900) {
alert("You're that old!")
}
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 = months[val2]+" "+form.day.value +", "+form.year.value
form.result2.value = days[val0]
}
// end script -->
</SCRIPT>


</HEAD>

<body >


<!-- <body>와 </body>사이에 다음을 삽입한다 -->

<form method="get">
<p align="center"><font size="2">당신이 태어난 달은? (1-12):
<input type="text" name="month" size="2">  
당신이 태어난 날짜는? (1-31): <input type="text" name="day" size="2">  
태어나신 해는? (eg. 1960): <input type="text" name="year" size="4"></font></p>
<p align="center"><font size="2">
<input type="button" value="Update" onclick="compute(this.form)">
<input type="reset" value="Clear"></font></p>
<p align="center"><font size="2">당신의 생일은 <input type="text" name="result1" size="18"> 이며
그날은 <input type="text" name="result2" size="3"> 요일 이었습니다.</font></p>
</form>



</BODY>
</HTML>

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