var system ={}; 
    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){//如果是電腦跳轉到百度 
        window.location.; 
    }else{  //如果是手機,跳轉到谷歌
        window.location.; 
    }