Capture Session variable in java

Hi

I am working on auotmation of rediff new account registration. And for that, I need to capture the value of session variable (a image that comes up randomly with jumbled up digits and alphabets, Registration verification code) at run time.

Can someone please suggest how can I achieve this using java / javascript / jsp

I don't know what you mean by 'capture a variable'.
Can you explain your question in a little more detail?