Js判斷客戶端是否為PC還是手持設備

function IsPC() 
       { 
           var userAgentInfo = navigator.userAgent; 
           var Agents = new Array("Android", "iPhone", "SymbianOS", "Windows Phone", "iPad", "iPod"); 
           var flag = true; 
           for (var v = 0; v < Agents.length; v++) { 
               if (userAgentInfo.indexOf(Agents[v]) > 0) { flag = false; break; } 
           } 
           return flag; 
       }