苹果官方网站判断ipad跳转js代码

这个是iPad访问help页面时，apple官方ipad跳转的JavaScript代码。

function browser_check() {

 var originalWindowLocation = window.location + "";
 var newWindowLocation;
 var server = 'http://' + window.location.hostname + '/ipad';
 var regexiPad = new RegExp(/iPad/);
  if( regexiPad.exec(navigator.userAgent) ) {
  newWindowLocation = server + '/4/interface/';
 } else {
  newWindowLocation = 'http://support.apple.com/manuals/ipad/';
 }
 if( -1 == originalWindowLocation.indexOf(newWindowLocation) ) {
  window.location = newWindowLocation + window.location.hash;
 }
}
browser_check();