Droplist Calling Scriptlet / Beans

I would like to have an HTML dropdown list where each selection calls
a method. The following code doesn't work, but it I hope it gives the
idea of what I'm trying to do:

<FORM NAME="frm">
<SELECT NAME="sel"
onChange="document.frm.sel.options[document.frm.sel.selectedIndex].value">
<OPTION SELECTED value="">--choose--
<OPTION VALUE="<% package1.method1; %>">Call Method 1
<OPTION VALUE="<% package1.method2; %>">Call Method 2
<OPTION VALUE="<% package1.method3; %>">Call Method 3
</SELECT>
</FORM>

Basically I would like to use the JavaScript 'onChange' to invoke the
method I select from the list.