When I use IE to open a page that contains a Viewport ,( like this one :http://docs.sencha.com/ext-js/4-0/#!...ed-viewer.html )it always have a warning like this :
??: 'id' ???????
it said that
Message :'id'is null or not an object
this error dose not influence this page though , it causes a big problem on my page . In all my page which have an error like this , all ext components could not be seen ! But when I use firefox or chrome to view the same page , there were no problem at all!
Any one know why ?