判断是手机端还是电脑端

1.isPC() 是电脑端，另一个是手机端

 /**
         * 是否PC
         */
        function isPC() {
            var userAgentInfo = navigator.userAgent;
            var Agents = ['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;
        }