Toggle between 2 IP addresses automatically

Hi,

Newbie here. Stumbled across looking for IP change batch file through this link

http://ccm.net/forum/affich 13513 how to change ip address from command prompt

It was a great file that worked fine. Now I am getting greedy and want the batch file to toggle between two addresses automatically whenever I run the batch file.

for example toggle between

192.168.1.10 and

192.168.1.13

Is there anyway to tweak the above batch file to do this ?