The error (Uncaught TypeError: Cannot read property 'mouseup' of undefined or SCRIPT5007: Unable to get value of the property 'mouseup': object is null or undefined ) manifests in Chrome and IE9 only and only if you have a debugger on, otherwise the page simply disposes without issues.
Click the misspelled word with the mouse and it changes to a textarea that you can edit. This has to be available through the keyboard as well. Related to http://feedback.telerik.com/Project/108/Feedback/Details/126937-add-tabindex-attributes-to-the-radspell-dialog-elements A possible workaround is attached. The DialogScriptFile is used to add tabIndexes and override some internal methods in order to provide a keyboard event. In the sample the misspelled word TabIndex is hardcoded to 2 and you need to leave room for it, regardless of the position you choose. It cannot be dynamic.
Wave Structure/Order is giving an error for RadSpell Control at "Not in Dictionary" label and Suggestions label. Hence our 508 testing is not passed. Please find the attachment for more details. URL is: http://demos.telerik.com/aspnet-ajax/spell/examples/overview/defaultcs.aspx Missing <h1> of Spell Check at the top of the dialog. Not in Dictionary and Suggestions should not be headings they should be form labels. Thanks