Hi

Thanks to the link to the full javascript list I was able to achieve what I wanted. I am afraid the example jeff gave did not work because ExtractRangeHTML and InsertHTML only affect the selected text. As we have nothing selected just a point where its clicked ExtractRangeHTML returned nothing and InsertHTML just wacked the html into the middle of the stuff I wanted replacing. However I did find a function that helped.....

var node = editor.GetPointNode();

editor.SelectControl(node);

editor.InsertHTML(html);

By using the selectcontrol I was able to highlight the control I wanted to replace then InsertHTML worked as we wanted.