randomly assigning subjects to conditions

[FONT=Calibri]Currently, I manually enter subject ID and condition # for each participant. But, I am wondering if there is any way to randomly assign participants to different conditions automatically by computer? I don't want my subjects to know their condition number and also I do not want to know it because I am not blind to their conditions then. I looked up the online manual. It explains how to randomize the order of items but not about randomly assigning people to conditions. I would appreciate it very much if you can help me. [/FONT]
[FONT=Calibri]Thank you![/FONT]