I have web page that contains a dhtmlx grid and has a collapsible panel on the right hand side of the grid. When the panel is collapsed, the dhtmlx grid resizes without any problems. The setSizes() and the _setAutoResize() functions fire once. However, when the panel is expanded, the setSizes() and the _setAutoResize() functions repeatedly fire as a result of the windows.setTimeout function in the _setAutoResize function. This is only happening on Internet Explorer. Any suggestions as to what may be occuring.