Passing earliest and latest with relative time modifiers

hi,

I have plotted a time chart for one host(say Host A) and on clicking(drilling down) particular time(say 07/02/2013:11:15:00AM). I want to see all the log entries for all the available hosts(Say Host A, Host B, Host C ) with time range as one min ago and one min later(i.e. 07/02/2013:11:14:00AM to 07/02/2013:11:16:00AM)

In a nutshell i am trying to corelate the different logs based on time stamp selected by user

Thanks