text highlighting with sencha framework and getting that text?

i have to develop an application with sencha touch in which user can highlight selected text in html开发者_开发百科 document, add notes and bookmark. please guide me where to start. how to add these things to my application?

Hi guys i found the answer. i have searched the net 2 days and I found no option for doing these things in Sencha. when i saw this link http://www.sencha.com/forum/showthread.php?122745-retreiving-selected-text-doesnt-work-in-htmlEditor-for-chrome-and-safari-browser

i decided to do this with javascript. You have to use old javascript and jquery to do these things till the time sencha adds new feature in it