寄情築園爪哇程式下載區 // http://java.love12.tw // 全方位.多元化.新世代休閒網站...

■ 語法主題：月亮週期計算

■ 控制碼內容：
■ 下載所須的圖示檔案，放置同目錄底下
將下面複製至 <body> 標籤後

<script language=JavaScript>

<!--hide

function showMoon() {

var height=1

var size = 50

var i

// var currentDate  = new Date(96, 1, 22, 16, 15, 0)

var currentDate  = new Date()

var x = currentDate

// alert("date = "+(x.getMonth()+1)+"/"+x.getDate()+"/"+x.getYear())

// Convert it to GMT

currentDate.setTime(currentDate.getTime() + (currentDate.getTimezoneOffset()*60000))

// Get Date (GMT) for recent full moon

// NOTE: months, hours, and minutes are 0 based

var blueMoonDate = new Date(96, 1, 3, 16, 15, 0)

// Compute length of lunar period -- source: World Almanac

var lunarPeriod  = 29*(24*3600*1000) + 12*(3600*1000) + 44.05*(60*1000)

var moonPhaseTime = (currentDate.getTime() - blueMoonDate.getTime()) % lunarPeriod

// alert("Moon phase in days = "+moonPhaseTime/(24*3600*1000))

// Compute various percentages of lunar cycle

var percentRaw = (moonPhaseTime / lunarPeriod)

// alert("% = "+percentRaw)

var percent    = Math.round(100*percentRaw) / 100

// alert("% = "+percent)

var percentBy2 = Math.round(200*percentRaw)

var left  = (percentRaw >= 0.5) ? "d015.black.gif" : "d015_white.gif"

var right = (percentRaw >= 0.5) ? "d015_white.gif" : "d015_black.gif"

document.write("<center>")

if (percentBy2 > 100) {

percentBy2 = percentBy2 - 100

}

for (i = -(size-1); i < size; ++i) {

var wid=2*parseFloat(Math.sqrt((size*size)-(i*i)));

if (percentBy2 != 100)

document.write ("<img src="+left +" height=1 width="+(wid*((100-percentBy2)/100))+">")

if (percentBy2 != 0)

document.write ("<img src="+right+" height=1 width="+(wid*((percentBy2)/100))+">")

document.write ("<br>")

} // for

document.write(	"</center>",

"<HR>",

"<h2>Wow, look at the moon!</h2>",

"Next full moon in about ",

Math.round((lunarPeriod-moonPhaseTime)/(24*3600*1000)),

" day",

Math.round((lunarPeriod-moonPhaseTime)/(24*3600*1000)) != 1 ? "s" : "",

"")

}

// -->

</script>