[java] Passing a parameter to an applet???

I''ve been looking for a good way to get a user written parameter from a site in to an applet that is on the same site. I have looked up a function in the applet clas called getParameter(String s) that gets the value from a tag in the html. But all examples Ive seen has a constant value on the param value like: Havn''t seen anywhere how to get a variable on the value of the param tag. I am just looking for a way that the user can write in the value.