Please use the right terms. "Java scripting" is a non-existing term. Do you mean Javascript or JSP? (which are two completely different worlds). And "EL variables" is somewhat meaningless. EL doesn't create variables, it uses the available variables from the scope in expressions.
I see you're new to the Java/JavaEE world. I recommend you to start here and go through it thoroughly:
http://java.sun.com/javaee/5/docs/tutorial/doc/
hi...
first of all.. thanks for reply...
second.. I am not new... I am very new to all this...
third and last... can u plz do me a favour...? CAN u plz for me...
go through "JSP 2.0 spec final version", in pdf file page no. 135 para 3.. or say.. chapter 5.. # JSP 5.1 para.. 2.