var gmt = 1258935790000;
var S = new Date(gmt);
var C = new Date();
var diffms = ( C - S );
var diff = Math.round(diffms/1000) ;
var Ctime = C.toLocaleString();
var Stime = S.toLocaleString();
var Czone = C.getTimezoneOffset()/60;
var Szone = C.getTimezoneOffset()/60;
var Space = '<td>&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp';
document.writeln('<table border=0>');
document.writeln('<tr>',Space,'<td>Server Time<td>',Stime,'<td>GMT ',Szone,'</td>');
document.writeln('<tr>',Space,'<td>Client Time<td>',Ctime,'<td>GMT ',Czone,'</td>');
document.writeln('<tr>',Space,'<td>Delta<td>',diff,' Second</td></table>');
//document.writeln('Hello World')