Regular Expression

[Kapil Khanna Avolent]

Hi,
 
I'm trying to extract the following string using Regular expression as
specified
 
String: requestType=AJAX&AJAXOpHandler=&sid=0.2566145450023796&mode
 
RE : requestType=AJAXOpHandler=\&sid=(0\.)(\d*)\&mode
 
p.s : I have tried this with \0\.(\d*) also
 
but when I'm using the RE variable, its simply printing the variable
name instead of the extracted string.
 
Could anyone explain how exactly I can use RE here.
 
Thanks.