function display()
{
rtime=etime-ctime;
if (rtime>60)
m=parseInt(rtime/60);
else
m=0;

s=parseInt(rtime-m*60);
if(s<10)
s="0"+s
//window.status="Time Remaining :  "+m+":"+s
window.setTimeout("checktime()",1000)
}

function settimes()
{
//alert("You have 40 minutes before you get booted!")
var time= new Date();
hours= time.getHours();
mins= time.getMinutes();
secs= time.getSeconds();
etime=hours*3600+mins*60+secs;
etime+=3600;  
/*
You can change the value of 120 according to how much
time you wish to set the timer. Where 120 is time in secs (120 = 2
mins * 60 secs/min). Max time is 60 mins (3600secs)
*/

checktime();
}

function checktime()
{
var time= new Date();
hours= time.getHours();
mins= time.getMinutes();
secs= time.getSeconds();
ctime=hours*3600+mins*60+secs
if(ctime>=etime)
expired();
else
display();
}

function expired()
{
//alert("Time expired");
location.href="session-timeout.asp";  //Put here the next page

}