passing variable between layouts

i have a parent layout which has 2 child layout :
var dhxLayout = new dhtmlXLayoutObject(“parentId”, “2U”);
dhxLayout.cells(“a”).attachURL(“header.php”);
dhxLayout.cells(“b”).attachURL(“tail.php”);

let say on cell(a), i have a text box, and on cell(b) i have a text box and button.
how can i pass a variable from cell(a) into cell(b) or trigger the button on cell(b)?

Thank You

i’ve already got the answers… thanks…

Check this:

http://docs.dhtmlx.com/doku.php?id=dhtmlxlayout:urlattaching

I hope this help you…