function IsPC(){

var userAgentInfo = navigator.userAgent;  

 var Agents = new Array("Android", "iPhone", "SymbianOS", "Windows Phone", "iPad", "iPod");  

  var flag = true; //PC端设备

   for (var v = 0; v < Agents.length; v++) {

       if (userAgentInfo.indexOf(Agents[v]) > 0) {

       flag = false; //移动端设备

       break;

       }

   }

   return flag;

}

if(/android/i.test(navigator.userAgent)){
    //安卓系统下的代码
  }

  if(/(iPhone|iPad|iPod|iOS)/i.test(navigator.userAgent)){
    //苹果系统下的代码
  }