<div id="gridbox" width="100%" height="250px" style="background-color:white;overflow:hidden"></div>
<script>
 
    mygrid = new dhtmlXGridObject('gridbox');
    ...
    mygrid.init();
        
    //disable tooltips for first column
    mygrid.enableTooltips("false,true,true,true,true");
               
    mygrid.loadXML("grid.xml");</script>