Determine if the mobile side is open or the PC is open

Decide if it's a mobile phone or a computer-opened page

var system ={        win : false,         mac : false,        xll  : false        };         var p = navigator.platform;        system.win  = p.indexof ("Win")  == 0;        system.mac =  p.indexof ("Mac")  == 0;        system.x11 =  ( p ==  "X11")  | |   (P.indexof ("Linux")  == 0);         if (system.win| | system.mac| | SYSTEM.XLL) {//Get current path             var   filename=location.href;//get the last/after content             filename=filename.substr (Filename.lastindexof ('/') +1);  //match the numbers out              var url=filename.replace (/[^a-z]/ig, "");             if (filename== ' index1 ') {                 var url= '/';             }             window.location.href=url;        }else{          }

Determine if the mobile is open or the PC is open