"package javax.servlet does not exist" Help me

I've installed Tomcat4.0 on my Windows 98, to try some examles

I i download ready class files it works but if i try to compile the source with the jdk1.3 here is the error message

"23: package javax.servlet does not exist

import javax.servlet.*;"

Help

Riccardo from Italy

[309 byte] By [RGiskard] at [2007-9-27 19:40:11]