how to pass value from jsp to applet at run time
Let me restate this to be sure I understand what you are trying to do.
Your jsp code on a server generates some HTML that includes an <APPLET tag in response to a browser's request.
The browser that reads the generated HTML and then reads the java class files or jar file for the applet. The applet starts execution.
At this point you want applet get a value from the jsp. Is that it?
The applet can either get the value from a <PARAM tag that would be generated by the jsp when it created the HTML or it could use an HTTP connection to request the info from the server.