i am new to Dojo.
I have meet a prob,error message didn't give me more info,only this,
Permission denied to call method XMLHttpRequest.open
[Break on this error] throw _13||Error(_12);
any clue will be appreciate.thanks.
And is that some good idea about debug,like tools or methods.any info or links resource is good enough.

permission denied on
permission denied on XMLHttpRequest (XHR) usually indicates you are trying to do a cross-domain XHR call. cross domain meaning anything not on the exact same host / port as the originating script.
firebug is a must have, as far as debugging. In IE, i try to use the Microsoft Script Editor (a jewel that ships with FrontPage / Office 200x) ... And you can't live without the IE-developers toolbar.