|
|
Das Formular:
|
<P><FORM name=myform> <CENTER><FONT SIZE="+1">Date:</FONT> <SELECT NAME=Monat onchange="theDateTime()"> <OPTION>Jan <OPTION>Feb <OPTION>Mar <OPTION>Apr <OPTION>May <OPTION>Jun <OPTION>Jul <OPTION>Aug <OPTION>Sep <OPTION>Oct <OPTION>Nov <OPTION>Dec </SELECT> <SELECT NAME=Tag onchange="theDateTime()"> <OPTION>01 <OPTION SELECTED>02 <OPTION>03 <OPTION>04 <OPTION>05 <OPTION>06 <OPTION>07 <OPTION>08 <OPTION>09 <OPTION>10 <OPTION>11 <OPTION>12 <OPTION>13 <OPTION>14 <OPTION>15 <OPTION>16 <OPTION>17 <OPTION>18 <OPTION>19 <OPTION>20 <OPTION>21 <OPTION>22 <OPTION>23 <OPTION>24 <OPTION>25 <OPTION>26 <OPTION>27 <OPTION>28 <OPTION>29 <OPTION>30 <OPTION>31 </SELECT> <SELECT NAME=Jahr onchange="theDateTime()"> <OPTION VALUE=1999>1999 <OPTION VALUE=2000>2000 <OPTION VALUE=2001>2001 </SELECT> Local <FONT SIZE="+1">Time: </FONT><SELECT NAME=Stunde onchange="theDateTime()"> <OPTION>00 <OPTION>01 <OPTION SELECTED>02 <OPTION>03 <OPTION>04 <OPTION>05 <OPTION>06 <OPTION>07 <OPTION>08 <OPTION>09 <OPTION>10 <OPTION>11 <OPTION>12 <OPTION>13 <OPTION>14 <OPTION>15 <OPTION>16 <OPTION>17 <OPTION>18 <OPTION>19 <OPTION>20 <OPTION>21 <OPTION>22 <OPTION>23 </SELECT> <SELECT NAME=Minute onchange="theDateTime()"> <OPTION>00 <OPTION>01 <OPTION SELECTED>02 <OPTION>03 <OPTION>04 <OPTION>05 <OPTION>06 <OPTION>07 <OPTION>08 <OPTION>09 <OPTION>10 <OPTION>11 <OPTION>12 <OPTION>13 <OPTION>14 <OPTION>15 <OPTION>16 <OPTION>17 <OPTION>18 <OPTION>19 <OPTION>20 <OPTION>21 <OPTION>22 <OPTION>23 <OPTION>24 <OPTION>25 <OPTION>26 <OPTION>27 <OPTION>28 <OPTION>29 <OPTION>30 <OPTION>31 <OPTION>32 <OPTION>33 <OPTION>34 <OPTION>35 <OPTION>36 <OPTION>37 <OPTION>38 <OPTION>39 <OPTION>40 <OPTION>41 <OPTION>42 <OPTION>43 <OPTION>44 <OPTION>45 <OPTION>46 <OPTION>47 <OPTION>48 <OPTION>49 <OPTION>50 <OPTION>51 <OPTION>52 <OPTION>53 <OPTION>54 <OPTION>55 <OPTION>56 <OPTION>57 <OPTION>58 <OPTION>59 </SELECT>
<P><INPUT TYPE=button NAME=Absenden VALUE="update" onclick="thisDateTime()">
<P><FONT SIZE="+1">Julian Day is: </FONT><INPUT TYPE=text NAME=JulDay VALUE="" SIZE=25>
<P><FONT SIZE="+1">UT is: </FONT><INPUT TYPE=text NAME=UTime VALUE="" SIZE=7>
<P><INPUT TYPE=text NAME=DateTime VALUE="" SIZE=70></CENTER> </FORM> |
Das JavaScript:
|
var dat, myDay, myMonth, myYear, myHour, myMinute, JD, UT, offset, dIM, DEC;
function daysInMonth(m, y) { var n=31; m=m-1; if ((m==0) || (m==2) || (m==4) || (m==6) || (m==7) || (m==9) || (m==11)) n=31; if ((m==3) || (m==5) || (m==8) || (m==10)) n=30; if (m==1) { n=28; if ((y % 4) == 0) n=29; if ((y % 100) == 0) n=28; if ((y % 400) == 0) n=29; } dIM=n; }
function DateTime() { var str = "On " +myYear+"/"+ myMonth+"/"+myDay+" at "+ myHour+":"+myMinute+" the declination of the Sun is "+ " " + Math.round(100*DEC)/100 + " deg"; document.myform.DateTime.value=str; }
function thisHour() { dat=new Date(); document.myform.Stunde.options[dat.getHours()].selected=true; myHour=dat.getHours() }
function thisMinute() { dat=new Date(); document.myform.Minute.options[dat.getMinutes()].selected=true; myMinute=dat.getMinutes() }
function thisUT() { dat=new Date() offset=dat.getTimezoneOffset() if (offset>=1380) offset=offset-1440 UT = myHour+(myMinute+offset)/60.0+dat.getSeconds()/3600.0 str=myHour+offset/60.0 if (myHour+offset/60.0<0) str= 24+myHour+offset/60.0 if (myHour+offset/60.0>24) str= -24+myHour+offset/60.0 str=" " + str + ":"; if (myMinute<10) str=str+"0"+myMinute else str=str+myMinute document.myform.UTime.value=str }
function thisJulDay() { yy = dat.getYear() if (yy<1000) yy=yy+1900 JulianDay(dat.getDate(),dat.getMonth(),yy,UT) document.myform.JulDay.value=JD }
function thisDay() { dat=new Date(); document.myform.Tag.options[dat.getDate()-1].selected=true; myDay=dat.getDate() }
function thisMonth() { document.myform.Monat.options[dat.getMonth()].selected=true; myMonth=dat.getMonth()+1 }
function thisYear() { dat=new Date() yy=dat.getYear()-1999 if (yy<0) {yy=yy+1900; myYear=dat.getYear()+1900} else myYear=dat.getYear() document.myform.Jahr.options[yy].selected=true; }
function theDay() { daysInMonth(myMonth,myYear) for (var i=0;i<document.myform.Tag.options.length;i++) {if (document.myform.Tag.options[i].selected==true) myDay=i+1} if (dIM<myDay) {myDay=dIM;document.myform.Tag.options[dIM-1].selected=true} }
function theMonth() { for (var i=0;i<document.myform.Monat.options.length;i++) {if (document.myform.Monat.options[i].selected==true) myMonth=i+1} }
function theYear() { for (var i=0;i<document.myform.Jahr.options.length;i++) {if (document.myform.Jahr.options[i].selected==true) myYear=i+1999} daysInMonth(myMonth,myYear) if (dIM<myDay) {myDay=dIM;document.myform.Tag.options[dIM-1].selected=true} }
function theHour() { for (var i=0;i<document.myform.Stunde.options.length;i++) {if (document.myform.Stunde.options[i].selected==true) myHour=i} }
function theUT() { if (offset>=1380) offset=offset-1440 UT = myHour+(myMinute+offset)/60.0+dat.getSeconds()/3600.0 str=myHour+offset/60.0 if (myHour+offset/60.0<0) str= 24+myHour+offset/60.0 if (myHour+offset/60.0>=24) str= -24+myHour+offset/60.0 str=" " + str + ":"; if (myMinute<10) str=str+"0"+myMinute else str=str+myMinute document.myform.UTime.value=str }
function theMinute() { for (var i=0;i<document.myform.Minute.options.length;i++) {if (document.myform.Minute.options[i].selected==true) myMinute=i} }
function theJulDay() { if (myYear<1900) myYear=myYear+1900 JulianDay(myDay,myMonth,myYear,UT) document.myform.JulDay.value=JD }
function JulianDay (date, month, year, UT){ if (year<1900) year=year+1900 if (month<=2) {month=month+12; year=year-1} B = Math.floor(year/400.0) - Math.floor(year/100.0) + Math.floor(year/4.0) A = 365.0*year - 679004.0 JD= A + B + Math.floor(30.6001*(month+1)) + date + UT/24.0 JD = JD + 2400000.5 }
function thisDateTime() { thisDay() thisMonth() thisYear() thisHour() thisMinute() thisUT() theJulDay() offset=dat.getTimezoneOffset() sunDec(JD) DateTime() }
function theDateTime() { theDay() theMonth() theYear() theHour() theMinute() offset=dat.getTimezoneOffset() theUT() theJulDay() sunDec(JD) DateTime() }
function frac(x) { return x-Math.floor(x); }
function sunDec(JD) { PI2 = 2.0*Math.PI; cos_eps = 0.917482; sin_eps = 0.397778; var M, DL, L, SL, X, Y, Z, R, T; T = (JD - 2451545.0) / 36525.0; M = PI2*frac(0.993133 + 99.997361*T); DL = 6893.0*Math.sin(M) + 72.0*Math.sin(2.0*M); L = PI2*frac(0.7859453 + M/PI2 + (6191.2*T+DL)/1296.0E3); SL = Math.sin(L); X = Math.cos(L); Y = cos_eps*SL; Z = sin_eps*SL; R = Math.sqrt(1.0-Z*Z); DEC = (360.0/PI2)*Math.atan(Z/R); } |
Letzte Änderung: