Start Building Professional
Web Apps Today

How to create dhtmlxWindows over dhtmlxLayout

I have created a <div id="parentId"> to contain a dhtmlxLayout with dhtmlxMenu. I would like to open a dhtmlxWindow from my dhtmlxMenu. I have read thru the doc and initialize with following code:

var dhxWins = new dhtmlxWindows();
dhxWins.enableAutoViewport(false);
dhxWins.attachViewportTo("parentId");
var win = dhxWins.createWindow("id_about", 0, 0, 100, 100);
dhxWins.setText("About");

However, my dhtmlxWindow content was empty once I reload the page. What is the correct way of initialize it?