i think there is  a problem with execCommand Method [see Knowledge Base http://msdn.microsoft.com/en-us/library/ms536419%28v=vs.85%29.aspx ] . This method support command identifiers listed in  these article http://msdn.microsoft.com/en-us/library/ms533049%28v=vs.85%29.aspx

the code above does not work also :'( please help me

Hi Herald,

WebHtmlEditor uses exactly those statements to perform undo/redo. Those statements are nothing more, but wrappers around document.execCommand(action,....).
In case of IE, the functionality/action of that command can be rather unstable and it heavily depends on currently focused element, selection, etc.

Hello Viktor,

Does this line of code works to WebHTMLEditor v9.2?

var editor = iged_getById(‘<%=WebHtmlEditor.ClientID%>’);
editor._format(‘undo’, ‘’, false, true);
editor._format(‘redo’, ‘’, false, true);