Required library edition:
Required library file: dhtmlxlayout.js

returns cell's id by index

• ind - cell's index (int)

Mote: max index depends on count of cells and layout's pattern

    var id_0 = dhxLayout.getIdByIndex(0); // returns "a"
    var id_1 = dhxLayout.getIdByIndex(1); // returns "b"
    ...