// 判斷是否為移動端運行環境 
if(/AppleWebKit.*Mobile/i.test(navigator.userAgent) || (/MIDP|SymbianOS|NOKIA|SAMSUNG|LG|NEC|TCL|Alcatel|BIRD|DBTEL|Dopod|PHILIPS|HAIER|LENOVO|MOT-|Nokia|SonyEricsson|SIE-|Amoi|ZTE/.test(navigator.userAgent))){ 
if(window.location.href.indexOf("?mobile")<0){ 
try{ 
if(/Android|webOS|iPhone|iPod|BlackBerry/i.test(navigator.userAgent)){ 
// 判斷訪問環境是 Android|webOS|iPhone|iPod|BlackBerry 則加載以下樣式 
setActiveStyleSheet("style_mobile_a.css"); 
} 
else if(/iPad/i.test(navigator.userAgent)){ 
// 判斷訪問環境是 iPad 則加載以下樣式 
setActiveStyleSheet("style_mobile_iPad.css"); 
} 
else{ 
// 判斷訪問環境是 其他移動設備 則加載以下樣式 
setActiveStyleSheet("style_mobile_other.css"); 
} 
} 
catch(e){} 
} 
} 
else{ 
// 如果以上都不是，則加載以下樣式 
setActiveStyleSheet("style_mobile_no.css"); 
} 
// 判斷完畢后加載樣式 
function setActiveStyleSheet(filename){document.write("＜link href="+filename+" rel=stylesheet＞");}

<script type="text/javascript"> 
if(/AppleWebKit.*mobile/i.test(navigator.userAgent) || (/MIDP|SymbianOS|NOKIA|SAMSUNG|LG|NEC|TCL|Alcatel|BIRD|DBTEL|Dopod|PHILIPS|HAIER|LENOVO|MOT-|Nokia|SonyEricsson|SIE-|Amoi|ZTE/.test(navigator.userAgent))){ 
    if(window.location.href.indexOf("?mobile")<0){ 
        try{ 
            if(/Android|webOS|iPhone|iPod|BlackBerry/i.test(navigator.userAgent)){ 
                window.location.href="手機頁面"; 
            }else if(/iPad/i.test(navigator.userAgent)){ 
                window.location.href="平板頁面"; 
            }else{ 
                window.location.href="其他移動端頁面" 
            } 
        }catch(e){} 
    } 
} 
</script>