--Load the AJAX API-->
<script type="text/javascript" src="https://www.google.com/jsapi"></scriptAPI and the package.the Google Visualization API is loaded.= new google.visualization.
--Load the AJAX API-->
<script type="text/javascript" src="https://www.google.com/jsapi"></scriptand the gantt chart package.Visualization API is loaded.var data = new google.visualization.DataT