isMac = (ua.indexOf("macintosh") != -1 || ua.indexOf("mac os x") != -1),
isLinux = (ua.indexOf("linux") != -1),
isSecure = window.location.href.toLowerCase().indexOf("https") === 0,
- isTouch = 'ontouchstart' in document.documentElement;
+ isTouch = 'ontouchstart' in window || window.DocumentTouch && document instanceof DocumentTouch;
// remove css image flicker
if(isIE && !isIE7){
try{