or
<telerik:RadEditor runat="server" ID="RadEditor1" OnClientCommandExecuted="editorCommandExecuted"></telerik:RadEditor><script type="text/javascript"> function editorCommandExecuted(editor, args) { if (!$telerik.isChrome) return; var dialogName = args.get_commandName(); var dialogWin = editor.get_dialogOpener()._dialogContainers[dialogName]; if (dialogWin) { var cellEl = dialogWin.get_contentElement() || dialogWin.ui.contentCell || dialogWin.ui.content, frame = dialogWin.get_contentFrame(); frame.onload = function () { cellEl.style.cssText = ""; dialogWin.autoSize(); } } }</script><asp:ScriptManager runat="server" /><telerik:RadEditor runat="server" ID="RadEditor1" OnClientLoad="OnClientLoad"></telerik:RadEditor><script type="text/javascript"> function OnClientLoad(editor) { if ($telerik.isChrome) editor.set_useClassicDialogs(true); }</script>
