$(function(){    
    var sUserAgent = navigator.userAgent.toLowerCase();      
    var bIsIpad = sUserAgent.match(/ipad/i) == "ipad";        
    var bIsIphoneOs = sUserAgent.match(/iphone os/i) == "iphone os";      
    var bIsMidp = sUserAgent.match(/midp/i) == "midp";      
    var bIsUc7 = sUserAgent.match(/rv:1.2.3.4/i) == "rv:1.2.3.4";      
    var bIsUc = sUserAgent.match(/ucweb/i) == "ucweb";      
    var bIsAndroid = sUserAgent.match(/android/i) == "android";      
    var bIsCE = sUserAgent.match(/windows ce/i) == "windows ce";      
    var bIsWM = sUserAgent.match(/windows mobile/i) == "windows mobile";      
    if(bIsIphoneOs || bIsAndroid || bIsWM){//如果是ios 或者 android 就显示 否则 你懂的
    }
})