How to submit in javascript to update zone?

[sohu]

if like this:
var myAjax = new Ajax.Request("poicenter.form", {
   method :'post',
   parameters :"c=c",
   onComplete :null
  });
tomcat will throw exception:Forms require that the request method be POST and 
that the t:formdata query parameter have values. 

if I just submit like this: form.submit(). Then isXHR() will return false and 
zone will not be update.

any advise?
2009-08-18 



sohu