Judging by cell phone information

/*
* Smartphone browser version information:
*
*/
var browser = {
Versions:function () {
var u = navigator.useragent, app = Navigator.appversion;
return {//Mobile terminal browser version information
Trident:u.indexof (' Trident ') >-1,//ie core
Presto:u.indexof (' presto ') >-1,//opera core
Webkit:u.indexof (' AppleWebKit ') >-1,//Apple, Google kernel
Gecko:u.indexof (' Gecko ') >-1 && u.indexof (' khtml ') = =-1,//Firefox kernel
Mobile:!! U.match (/applewebkit.*mobile.*/)
|| !! U.match (/applewebkit/),//Whether it is a mobile terminal
Ios:!! U.match (/\ (i[^;] +;( U;)? Cpu.+mac OS x/),//ios terminal
Android:u.indexof (' Android ') >-1 | | U.indexof (' Linux ') >-1,//android terminal or UC Browser
Iphone:u.indexof (' IPhone ') >-1 | | U.indexof (' Mac ') >-1,//whether for iphone or Qqhd browser
Ipad:u.indexof (' ipad ') >-1,//whether ipad
Webapp:u.indexof (' Safari ') = =-1
Whether the web should program, no head with the bottom
};
}(),
Language: (Navigator.browserlanguage | | navigator.language)
. toLowerCase ()
}

if (Browser.versions.ios | | browser.versions.iPhone
|| BROWSER.VERSIONS.IPAD) {

document.getElementById ("J_download"). SetAttribute ("href", value= "${data.ios}")
} else if (browser.versions.android) {
document.getElementById ("J_download"). SetAttribute ("href", value= "${data.android}")
}

Judging by cell phone information