dhtmlx grid in xhtml page

Question

I need the dxhtmlgrid to work in a xhtml page. All the examples are in plain html and when I try and convert to xhtml I get errors. Can anyone help me get a dhtmlxgrid to work in a xhtml page? I am generating my grid from a table:

http://dhtmlx.com/docs/products/dhtmlxGrid/samples/12_initialization_loading/03_grid_int_from_html.html

I get the following javascript error message:

this.hdr.rows is undefined
[Break on this error] this.cellWidthPX[fcols[i]]=next;summ+...etTimeout(function(){self.setSizes()