Access Java code in Javascript function

hi all,
i have a requirement where i need to access a method defined in a plain java class from a javascript function.
can anyone please let me know, who can i achieve this.
thanks in advance

I have a hyperlink in a JSP, onclick of this, i need to perform two tasks:
(1) the page should be redirected to the same page.
(2) excute a function which actually defines code to run a perl script.
so i have wrapped the function in a class and trying to call this function in the javascript function.
now i am not sure will this work.
so if there are any other alternatives to achieve this, please share.

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