realize function of set video as background by call funtion _movie()
the img increase step by step when slide to step background by img
abstract a function named _audio_IE to deal with IE which not support html5 tag audio
rename all the funtion's paras in pam.js in order to easy to distinguish
make picture\audio\movie use the same one url define header of pam.js
abstract a function named browserCheck to check the browser are using
change just check ie to check ie's version
should check Sys.ie before check ie's version
abstract a function named _movie_IE to deal with IE which not support html5's tag video
Fix Bug: Uncaught TypeError: Cannot call method 'split' of undefined