TreeGrid initialization

TreeGrid is initialized via script and populated from xml source
Source
<link rel="STYLESHEET" type="text/css" href="../../../dhtmlxGrid/codebase/dhtmlxgrid.css">
<link rel="stylesheet" type="text/css" href="../../../dhtmlxGrid/codebase/skins/dhtmlxgrid_dhx_skyblue.css">
<script  src="../../../dhtmlxGrid/codebase/dhtmlxcommon.js"></script>
<script  src="../../../dhtmlxGrid/codebase/dhtmlxgrid.js"></script>
<script  src="../../../dhtmlxGrid/codebase/dhtmlxgridcell.js"></script>
<script  src="../../codebase/dhtmlxtreegrid.js"></script>
 
 
 
            <div id="gridbox" style="width:570px;height:137px;background-color:white;"></div>
<br>
 
<script>mygrid = new dhtmlXGridObject('gridbox');
mygrid.selMultiRows = true;
mygrid.imgURL = "../../../dhtmlxGrid/codebase/imgs/icons_greenfolders/";
mygrid.setHeader("Tree,Plain Text,Long Text,Color,Checkbox");
mygrid.setInitWidths("150,100,100,100,100");
mygrid.setColAlign("left,left,left,left,center");
mygrid.setColTypes("tree,ed,txt,ch,ch");
mygrid.setColSorting("str,str,str,na,str");
mygrid.init();
mygrid.setSkin("dhx_skyblue");
mygrid.loadXML("../common/test_list_1.xml");</script>