hi

My question is very simple

 In theAdSense custom search it is possible to set whether the search will be performed in the entire internet or in specific websites

If you choose the specific websites option - websites that I choose - there's a text box where you're requested to enter the websites in which you want the search to be performed. It's is said to enter each website in a seperate row

The above is perfectly clear. My question is: how many websites can be entered to this text box? Is there any limitation to the number of websites that can be defined? Can one enter millions any number of websites?

thanks

Yossi