alert on blocking chains via email

This is a script I use to watch for blocking chains on a server there are four variables to be set. @Duration tells it how long to run. This will be an active thread for the duration. @IntervalSec how often to poll for blocking. @maxwaittime time in miliseconds a thread that is blocked that you wish to allert on 30000 is 30 seconds. If a thread has been blocked that long alerts will start going out. @recivers, people who get the emails.

You can set it up as a job to start it will always show as executing until the duration runs out. I have it set to run every minute just in case there is a thread exit it will restart the job again.