Problem: launch javaBean method in Javascript?

I want to launch a method of javaBean in javascript, but it always occur errors.
the main code is as following:
<jsp:useBean id="getPropertyBean" class="mmes.BeanSetExamProperty" scope="page"/>
<html><head>
<script language="JavaScript" type="text/JavaScript">
function check(){
var kp_name,kp_code;
for(var i=0; i<10; i++){
kp_name = form1.selectedknowledgepoint.options.text;
kp_code = getPropertyBean.getCode(kp_name); //getCode(String name) is a method
// Just here, error occurs.
} //end of check()
</script>
Because kp_name is varible in function check(), So, how can I launch getCode()?

sigh...
JSP runs on the Server.
Javascript runs on the client.
JSP. Server
Javascript. Client
These things are not the same.
They can not communicate with eachother directly.
All of the JSP code runs when the the page is requested. It finishes, and sends the page back to the client.
THEN you can run javascript code at the client end.
The only way you have to invoke java/jsp code again is to send an http request by submitting a form/ clicking a hyperlink.
In short - you can't call Javabeans from javascript.

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