For v.1 the tooltip example code is in /examples/grid/images.htm -
// add tooltips to the first column template and data model
obj.getColumnTemplate(0).setAttribute("title", function(){return this.getItemProperty("tooltip")});
obj.defineDataProperty("tooltip", function(i, j){return "Type: " + myData[i][2] + "\nDate Modified: " + myData[i][3] + "\nSize: " + myData[i][1]});
also here -
/javascript.forum.1044.4/dynamic-tooltips.html
