//平台、设备和操作系统 
var system = { 
    win: false, 
    mac: false, 
    xll: false, 
    ipad:false 
}; 
//检测平台 
var p = navigator.platform; 
system.win = p.indexOf("Win") == 0; 
system.mac = p.indexOf("Mac") == 0; 
system.x11 = (p == "X11") || (p.indexOf("Linux") == 0); 
system.ipad = (navigator.userAgent.match(/iPad/i) != null)?true:false; 
//跳转语句，如果是手机访问就自动跳转到wap.baidu.com页面 
if (system.win || system.mac || system.xll||system.ipad) { 
    // to do
} else { 
    window.location.href = "http://www.yitaolawyer.com/wap/index.php"; 
}