Hotw to "Load Balance"

I have 2 line ADSL and want to use Load Balance with 2 lines. I had no idea about how so setup please give me some config to show how to setup Load balance.

check this :

http://www.mikrotik.com/docs/ros/2.8/appex/scripting1.content#11.2.4.3


and the new manula under failover and use the search function above to look up load balencer (set switch under to all/and)