jQuery Grid Plugin - jqGrid

Hi people.

I've got a problem when i call function outside the grid. An example:

I've copied the code in this page:

jQgrid examples ——> Row Editing > Custom edit

If i click on a 'E' button and then on the 'S' button, the function do its job.

But if i create a new button (<input type=”button” etc..etc…) with the same code (giving a static value to the 'cl' variable, ofcourse), when i click it, nothing happen.

I've tryed with button property 'onclick' and also with jqgrid event jQuery(#mybutton).click(function(){…….})

Nothing happen. Why?