new method ajax.formToData

only for <input>, <select> and <textarea>

how to use
----------
form example:
<input id="someId_title" value="hello">
<input id="someId_about" value="this is very simple and untested">

JS:
var data=ajax.formToData("someID_");

data will be an array like
data['title']="hello";
data['about']="this is very simple and untested";