Javascript - getting the future time?

I hope that made sense. I have a javascript function that takes the the current time and creates a random time in the future in order to refresh the page content. I was wondering if anyone here could tell me how to add the future time which is just a value of miliseconds, to the current time to figure out what the actual time will be when the page refreshes. If this does not make sense, mabey the code below will make it more clear:

var rightnow = new Date();
document.write("Time Now:" + rightnow.getHours() + ":" + rightnow.getMinutes());
var randNum = Math.floor( Math.random() * 7200000) + 3600000;
var newCheck = Math.round(randNum/60000)
document.write(" - Next Check In:" + newCheck + " Minutes")
setTimeout('x();', randNum)
function x() {}

Code (markup):

 

Did you mean this ?

var rightnow = new Date();
document.write("Time Now:" + rightnow.getHours() + ":" + rightnow.getMinutes());
var randNum = Math.floor( Math.random() * 7200000) + 3600000;
var newCheck = Math.round(randNum/60000)%60 + rightnow.getMinutes()
var nexthour = rightnow.getHours() + Math.floor(Math.round(randNum/60000) / 60)
document.write(" - Next Check In:" + nexthour + ":" + newCheck)
setTimeout('x();', randNum)
function x() {}

Code (markup):

 

Hey, that looks promising. I'll try it out. Thanks.

 

i think you mean this:

I have also fixed a bug to show 02:48 or 11:02 instead of 2:48 and 11:2 as it did before

var rightnow = new Date();

var TimeM = rightnow.getMinutes();
var TimeH = rightnow.getHours();

var fTimeM = TimeM;
var fTimeH = TimeH;

if (TimeH < 10) TimeH = '0'+TimeH;
if (TimeM < 10) TimeM = '0'+TimeM;

document.write("Time Now:" + TimeH + ":" + TimeM);
var randNum = Math.floor( Math.random() * 60000); //+ 3600000;
var newCheck = Math.round(randNum/60000);

fTimeM += newCheck-(Math.floor(newCheck/60))*60;
if (fTimeM > 60)
{
   x = Math.floor(fTimeM/60);
   fTimeH += x;
   fTimeM -= x*60;
}

fTimeH += Math.floor(newCheck/60);
if (fTimeH >= 24)
{
   fTimeH -=24;
}

if (fTimeH < 10) fTimeH = '0'+fTimeH;
if (fTimeM < 10) fTimeM = '0'+fTimeM;

document.write(" - Next Check In:" + newCheck + " Minutes");
document.write(' - Next Check At:' + fTimeH + ' : '+fTimeM);
setTimeout('x();', randNum);


function x() 
{
   document.location = document.location;
}

Code (markup):

 

Also I have made that refresh function for you....

 

It's safer and easier to work with the serial representation of a date when you need to do date math. For example:

var now = new Date();
var serial = now.valueOf();
var then = new Date(serial + 5 * 60 * 1000);
alert(then.toString());

Code (markup):

This will calculate a new date 5 minutes from now.

J.D.