I have an ActionSheet with several buttons that link to social networks via their url-based 'share' functions. Half the URL i'm linking to is pre-set, the other half is query string and is dynamic based on the article the user selects from a List. I can't simply use a hyperlink in a button since I don't know what the final URL will be - i was hoping instead to use a 'location' style or window.open style method, but didn't know if there was a more elegant Sencha/EXTJs implementation?