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

// Konvertiert zu GMT

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

// Datum (GMT) für den vollen Mond


// 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) ? "../images/black.gif" : "images/white.gif"
var right = (percentRaw >= 0.5) ? "../images/white.gif" : "images/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

if 	(Math.round((lunarPeriod-moonPhaseTime)/(24*3600*1000)) != 0)
{
document.write( "<br><br>Der nächste Vollmond ist in (etwa) ",

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

                                " Tag",

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

                                "</center>")
}
else {document.write( "<br><br>Heute ist Vollmond! ");}
								
}