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<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=iso-8859-1">
<title>The official U.S. time - clock</title>
<script language="javascript1.1"><!--
var ClientRecieveTime=new Date();
// BEGIN - NIST DYNAMIC DATA /////////////////////////////
var NISTSendTime = new Date( "July 22, 2001 20:00:57");
var QueryTimeZone = -7;
var QueryTimeZoneOffsetMin = -420
var QueryTimeZoneName = "Pacific";
var QueryDSTString = "Daylight Saving Time";
// END - NIST DYNAMIC DATA ////////////////////////////////////
// convert NIST time to ms
var NISTSendTimeGMTms = NISTSendTime.getTime() ;
// NIST start time in the query time zone
var QueryTimeZoneOffset = ( QueryTimeZoneOffsetMin * 60 * 1000 ) ;
// Client start time in some time zone
var ClientRecieveTimems = ClientRecieveTime.getTime() ;
// what timezone does your computer think it is? - in minutes
var ClientTimeZone = Math.floor(NISTSendTime.getTimezoneOffset()) ;
var ClientNISTDelta = Math.floor(NISTSendTimeGMTms - ClientRecieveTimems);
// -->
</script>
<csscriptdict>
<script><!--
CSStopExecution = false;
CSInit = new Array;
function CSScriptInit() {
idxArray = new Array;
for(var i=0;i<CSInit.length;i++)
idxArray[i] = i;
CSAction2(CSInit, idxArray);
}
CSAg = window.navigator.userAgent; CSBVers = parseInt(CSAg.charAt(CSAg.indexOf("/")+1),10);
function IsIE() { return CSAg.indexOf("MSIE") > 0;}
function CSIEStyl(s) { return document.all.tags("div")[s].style; }
function CSNSStyl(s) { return CSFindElement(s,0); }
function CSFindElement(n,ly) { if (CSBVers < 4) return document[n];
var curDoc = ly ? ly.document : document; var elem = curDoc[n];
if (!elem) { for (var i=0;i<curDoc.layers.length;i++) {
elem = CSFindElement(n,curDoc.layers[i]); if (elem) return elem; }}
return elem;
}
function CSButtonReturn () {
var bAgent = window.navigator.userAgent;
var bAppName = window.navigator.appName;
if ((bAppName.indexOf("Explorer") >= 0) && (bAgent.indexOf("Mozilla/3") >= 0) && (bAgent.indexOf("Mac") >= 0))
return false; // follow link
else return true; // follow link
}
CSIm = new Object();
function CSIShow(n,i) {
if (document.images) {
if (CSIm[n]) {
var img = (!IsIE()) ? CSFindElement(n,0) : document[n];
if (img && typeof(CSIm[n][i].src) != "undefined") {img.src = CSIm[n][i].src;}
if(i != 0)
self.status = CSIm[n][3];
else
self.status = " ";
return true;
}
}
return false;
}
function CSILoad(action) {
im = action[1];
if (document.images) {
CSIm[im] = new Object();
for (var i=2;i<5;i++) {
if (action[i] != '') { CSIm[im][i-2] = new Image(); CSIm[im][i-2].src = action[i]; }
else CSIm[im][i-2] = 0;
}
CSIm[im][3] = action[5];
}
}
CSStopExecution = false;
function CSAction(array) {
return CSAction2(CSAct, array);
}
function CSAction2(fct, array) {
var result;
for (var i=0;i<array.length;i++) {
if(CSStopExecution) return false;
var actArray = fct[array[i]];
var tempArray = new Array;
for(var j=1;j<actArray.length;j++) {
if((actArray[j] != null) && (typeof(actArray[j]) == "object") && (actArray[j].length == 2)) {
if(actArray[j][0] == "VAR") {
tempArray[j] = CSStateArray[actArray[j][1]];
}
else {
if(actArray[j][0] == "ACT") {
tempArray[j] = CSAction(new Array(new String(actArray[j][1])));
}
else
tempArray[j] = actArray[j];
}
}
else
tempArray[j] = actArray[j];
}
result = actArray[0](tempArray);
}
return result;
}
CSAct = new Object;
// --></script>
</csscriptdict>
<csactiondict>
<script><!--
CSInit[CSInit.length] = new Array(CSILoad,/*CMP*/'change time zone',/*URL*/'images/clock/changetz4.gif',/*URL*/'images/clock/changetz3.gif',/*URL*/'','');
CSInit[CSInit.length] = new Array(CSILoad,/*CMP*/'home',/*URL*/'images/clock/clockhome1.gif',/*URL*/'images/clock/clockhome2.gif',/*URL*/'','');
CSInit[CSInit.length] = new Array(CSILoad,/*CMP*/'problems',/*URL*/'images/prob3.gif',/*URL*/'images/prob4.gif',/*URL*/'','');
// --></script>
</csactiondict>
</head>
<body bgcolor="black" onload="CSScriptInit();">
<center>
<table border="0" cellpadding="0" cellspacing="0" frame="" width="100%" height="93%">
<tr align="center" valign="middle">
<td>
<table border="0" cellpadding="0" cellspacing="0">
<tr>
<td></td>
<td align="right">
<a href="timezone.cgi?Pacific/d/-8"><img src="images/javaoffdk.gif" vspace="1" width="157" height="5" name="IsJava" border="0" alt="Switch to non-animated version of this page (without Java)"></a>
</td>
<td></td>
</tr>
<tr>
<td colspan="3" bgcolor="#ffcd38"><spacer type="block" width="1" height="1"></td>
</tr>
<tr>
<td bgcolor="#ffcd38"><spacer type="block" width="1" height="1"></td>
<td>
<table border="0" cellpadding="0" cellspacing="0" frame="" width="480" bgcolor="#00695e" background="images/bgndteal.gif">
<tr>
<td width="21" rowspan="7" valign="top" background="images/starstripe-bg.jpg"><img height="416" width="21" src="images/starstripe.jpg"></td>
<td><img height="26" width="372" src="images/rightnow3.gif" border="0" hspace="5" vspace="5" alt="Right now, the official U.S. time is:"></td>
</tr>
<tr>
<td align="center">
<applet code="utcnist4.class" codebase="/" width="350" height="100" ignore>
<param name="MINUTESOFFSET" value="-420">
<param name="BACKGROUNDCOLOR" value="0x00695E">
<param name="FOREGROUNDCOLOR" value="0xFFFFEE">
</applet>
</td>
</tr>
<tr>
<td align="center"><img height="3" width="438" src="images/clock/horz2line.gif" vspace="5"></td>
</tr>
<tr valign="middle">
<td align="center"><font size="6">
<table border="0" cellpadding="0" cellspacing="4" frame="">
<tr>
<td><a href="/" onmouseover="return CSIShow(/*CMP*/'button2',1)" onmouseout="return CSIShow(/*CMP*/'button2',0)" onclick="return CSButtonReturn()"><csobj w="74" h="39" t="Button" ht="images/clock/changetz3.gif"><a href="/" onmouseover="return CSIShow(/*CMP*/'change time zone',1)" onmouseout="return CSIShow(/*CMP*/'change time zone',0)" onclick="return CSButtonReturn()"><img src="images/clock/changetz4.gif" width="74" height="39" name="change time zone" border="0"></a></csobj></a></td>
<td></td>
<td align="center"><font color="#c7ee59" face="Arial,Helvetica,Geneva,Swiss,SunSans-Regular">You have chosen the <b>
<script language="JavaScript1.2"><!--
document.write ( QueryTimeZoneName );
// -->
</script>
timezone</b></font><br>
<font size="2" color="#c7ee59" face="Arial,Helvetica,Geneva,Swiss,SunSans-Regular">
<script language="JavaScript1.2"><!--
if ( Math.floor (QueryTimeZone) < 0)
document.write ( ' Coordinated Universal Time ' + QueryTimeZone + ' hours; ' );
else
document.write ( ' Coordinated Universal Time +' + QueryTimeZone + ' hours; ' );
document.write (QueryDSTString + '.');
// -->
</script>
</font></td>
<td></td>
<td align="right"><csobj w="74" h="39" t="Button" ht="images/prob4.gif"><a href="about.html" onmouseover="return CSIShow(/*CMP*/'problems',1)" onmouseout="return CSIShow(/*CMP*/'problems',0)" onclick="return CSButtonReturn()"><img src="images/prob3.gif" width="74" height="39" name="problems" border="0"></a></csobj></a></td>
</tr>
</table>
</font></td>
</tr>
<tr>
<td align="center"><img height="3" width="438" src="images/clock/horz2line.gif" vspace="5"></td>
</tr>
<tr>
<td align="center">
<table border="0" cellpadding="0" cellspacing="0" frame="">
<tr>
<td width="77" align="center" valign="top"></td>
<td width="296"><img height="160" width="300" src="images/xearths/night.jpg" name="xearth"></td>
<td width="78" align="left" valign="bottom"><img height="120" width="46" src="images/clock/sunshine.gif" hspace="3" vspace="5"></td>
</tr>
<tr>
<td width="77"></td>
<td width="296" align="center"> </td>
<td width="78"></td>
</tr>
</table>
</td>
</tr>
<tr>
<td align="center">
<table border="0" cellpadding="0" cellspacing="0">
<tr>
<td colspan="2"><img height="11" width="221" src="images/timeby.gif"></td>
</tr>
<tr>
<td align="right"><a href="about.html"><img height="17" width="118" src="images/aboutsite_sm.gif" border="0"></a></td>
<td><a href="exhibits.html"><img height="17" width="102" src="images/timeexhibits_sm.gif" border="0"></a></td>
</tr>
</table>
</td>
</tr>
</table>
</td>
<td bgcolor="#ffcd38"><spacer type="block" width="1" height="1"></td>
</tr>
<tr>
<td colspan="3" bgcolor="#ffcd38"><spacer type="block" width="1" height="1"></td>
</tr>
</table>
<br clear="all">
<csobj w="301" h="34" t="Button" ht="images/clock/clockhome2.gif"><a href="/" onmouseover="return CSIShow(/*CMP*/'home',1)" onmouseout="return CSIShow(/*CMP*/'home',0)" onclick="return CSButtonReturn()"><img src="images/clock/clockhome1.gif" width="301" height="34" name="home" border="0"></a></csobj></td>
</tr>
</table>
<p>
<script language="JavaScript1.2"><!--
updatexearthImage();
function updatexearthImage() {
// get the computer's date
var Thisdate = new Date();
// convert to NIST date, using offset calculated in ClientNISTDelta
ThisMilliseconds = Thisdate.getTime() + ClientNISTDelta ;
document.images['xearth'].src = xearthSrc(ThisMilliseconds);
setTimeout("updatexearthImage()", 10000);
}
function xearthSrc(ThisMilliseconds) {
var ssue = ThisMilliseconds / 1000;
var TWOPI = 2 * Math.PI;
var EpochStart = 631065600;
var DaysSinceEpoch = (ssue - EpochStart) / (24*3600);
var RadsPerDay = TWOPI / 365.242191;
var Epsilon_g = 279.403303 * (TWOPI / 360);
var OmegaBar_g = 282.768422 * (TWOPI / 360);
var Eccentricity = 0.016713;
var MeanObliquity = 23.440592 * (TWOPI / 360);
//Compute lambda = sun_ecliptic_longitude(ssue)
//Begin sun_ecliptic_longitude
var D = DaysSinceEpoch;
var N = RadsPerDay * D;
N = N % TWOPI;
if (N < 0) N += TWOPI;
var M_sun = N + Epsilon_g - OmegaBar_g;
if (M_sun < 0) M_sun += TWOPI;
//Compute var E = solve_keplers_equation(M_sun);
//Begin solve_keplers_equation
var E = M_sun;
var delta;
while (1) {
delta = E - (Eccentricity*Math.sin(E)) - M_sun;
if (Math.abs(delta) <= 1E-10) break;
E -= delta / (1 - (Eccentricity*Math.cos(E)));
}
//End solve_keplers_equation
var lambda = OmegaBar_g + (2 * Math.atan(Math.sqrt((1+Eccentricity) / (1-Eccentricity)) * Math.tan(E/2)));
//End sun_ecliptic_longitude
//Compute ecliptic_to_equatorial(lambda, 0.0, alpha, delta)
var sin_e = Math.sin(MeanObliquity);
var cos_e = Math.cos(MeanObliquity);
var alpha = Math.atan2(Math.sin(lambda)*cos_e, Math.cos(lambda));
var delta = Math.asin(sin_e*Math.sin(lambda));
//End ecliptic_to_equatorial
//Compute GST(ssue)
//Compute JD = julian_date(year, month, day)
var TmpDate = new Date(ThisMilliseconds);
var OffsetMilliseconds = ThisMilliseconds ; //+ (60000*TmpDate.getTimezoneOffset());
var ThisDate = new Date(OffsetMilliseconds);
var y = ThisDate.getYear();
if (y < 1000) y += 1900;
var m = ThisDate.getMonth() + 1;
var z = ThisDate.getDate();
// if ((m==1) || (m==2)) {
// y -= 1;
// m += 12; }
var A = y / 100;
var B = 2 - A + (A/4);
var C = 365.25 * y;
var D = 30.6001 * (m+1);
var JD = B + C + D + z + 1720994.5;
//End julian_date
var T = (JD - 2451545) / 36525;
var T0 = ((((T + 2.5862E-5) * T) + 2400.051336) * T) + 6.697374558;
T0 = T0 % 24;
if (T0 < 0) T0 += 24;
var UT = ThisDate.getHours() + ((ThisDate.getMinutes() + (ThisDate.getSeconds() / 60)) / 60);
T0 += UT * 1.002737909;
T0 = T0 % 24;
if (T0 < 0) T0 += 24;
//End GST
var tmp = alpha - ((TWOPI/24)*T0);
while (tmp < -Math.PI) {tmp += TWOPI;};
while (tmp > Math.PI) {tmp -= TWOPI;};
var lon = tmp * (360/TWOPI);
var lat = delta * (360/TWOPI);
//Generate the path of the appropriate xearth image
//lon is even
lon = Math.round(lon);
//if (lon & 1 != 0) {
if (lon % 2 != 0) {
if (lon > 0) {
lon -= 1;
}
else {
lon += 1;
}
}
// force even for mozilla 4.01-4.05
// Consolidate lines, 4/5/01 - PRF
lon = Math.round(lon/2) * 2;
if (lon <= -181) lon = -180;
if (lon >= 181) lon = 180;
//lat is odd
lat = Math.round(lat);
//if (lat & 1 == 0) {
if (lat % 2 == 0) {
if (lat > 0) {
lat -= 1;
}
else {
lat += 1;
}
}
// force odd for mozilla 4.01-4.05
// Fixed broken algorithm, 4/5/01 - PRF
lat = (Math.round(lat/2 - 1) * 2) + 1;
if (lat <= -24) lat = -23;
if (lat >= 24) lat = 23;
var latStr; var lonStr;
if (lat < 0)
latStr = (-lat) + "S";
else
latStr = lat + "N";
if (lon < 0)
lonStr = (-lon) + "S";
else
lonStr = lon + "N";
return "images/xearths/" + latStr + "/" + lonStr + ".jpg";
//return lon;
}
// -->
</script>
</center>
</body>
</html>
|
