detect mobile / tablet device and insert into body class

gistfile1.js

// this project is move to https://github.com/girvan/mobile-detection

(function(){

 var device = '', _ipad = 'ipad', _iphone = 'iphone', ua = navigator.userAgent.toLowerCase();
 if( ua.indexOf(_ipad) != -1 )
     device = 'ios tablet ' + _ipad;
 else if( ua.indexOf(_iphone) != -1 )
     device = 'ios mobile ' + _iphone;
 else if( ua.match(/android/) )
 {
     device = 'android';
     if(ua.indexOf('mobile')==-1)
         device += ' tablet';
     else
         device += ' mobile';
 }
 if(device)
 {
     device = 'touch ' + device;
     document.documentElement.className += ' ' + device;
 }
 window._device = device;
}
)();