posted 17 years ago
JSP/Java runs at the server machine. Javascript runs at the client machine.
So basically you need to fire a request to the server.
There are several ways to do it in Javascript.
1) A plain GET request using window.location.
2) A form submit using form.submit().
3) An asynchronous request using XmlHttpRequest object (Ajax).
Alternatively, if you just need a JSP/Java variable which is already available in the scope while rendering the HTML output, then you can also just let JSP print it out as a Javascript variable. E.g. var foo = '${foo}';
That said, the term "JSP function" makes me think that you wrote raw Java code as scriptlet in a JSP file. This is considered a bad practice. You should write Java code in Java classes. Use a Servlet class as port to the Java code.
