var monthname = new MakeArray("January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December");
var dayname = new MakeArray("Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" );
function isLeapYear(yy) {
if( Math.floor( yy / 400 ) * 400 == yy ) return true;
else if( Math.floor( yy / 100 ) * 100 == yy ) return false;
else if( Math.floor( yy / 4 ) * 4 == yy ) return true;
else return false;
}
function limitDay( yy, mm ) {
switch( mm ) {
case 3 : return 30;
case 5 : return 30;
case 8 : return 30;
case 10 : return 30;
case 1 : return isLeapYear( yy ) ? 29 : 28;
default : return 31;
}
}
function ComputeGPSWeek( yy2, mm2, dd2 ) {
var basedate = new Date(1980, 0, 6);
var todaydate = new Date(yy2, mm2, dd2);
var totaldays = Math.floor((todaydate - basedate) / 86400 / 1000) + 1;
var gpsweek = Math.ceil(totaldays / 7) - 1;
return gpsweek;
}
function ComputeDayOfYear( yy2, mm2, dd2 ) {
var basedate = new Date(yy2, 0, 1);
var todaydate = new Date(yy2, mm2, dd2);
var totaldays = Math.floor((todaydate - basedate) / 86400 / 1000) + 1;
return totaldays;
}
function MakeArray() {
this.length = MakeArray.arguments.length;
for(i = 0; i < this.length; i++)
this[i] = MakeArray.arguments[i];
}
function popupCalender() {
var todate = new Date();
var fyy = todate.getFullYear();
var fmm = todate.getMonth();
ViewCalender( fyy, fmm ); // Show Calendar with specail year and month
}
function ViewCalender( yy, mm ) {
var firstdate = new Date( yy, mm, 1 );
var firstdow = firstdate.getDay();
var tDay = 1 - firstdow;
var tGPSWeek = ComputeGPSWeek( yy, mm, 1 );
var lastday = limitDay( parseInt(yy), parseInt(mm) );
var lastgw = ComputeGPSWeek( yy, mm, lastday );
var tMonth = parseInt(mm) + 1;
var gwcWin = open("", "GPSWeekCalendarWindow", "width=500,height=350" );
// open document for further output
with( gwcWin.document ) {
open();
clear();
// create document
writeln("");
writeln(" ");
writeln(" GPS Week Calendar");
writeln("");
writeln("");
writeln("