複製代碼代碼如下：
<html>
<頭>
<腳本類型=“ text/javascript”>
/ *判斷設備是否為pc */
函數ispc（）{
var useragentinfo = navigator.useragent;
VAR Adgents = new Array（“ Android”，“ iPhone”，“ Symbianos”，“ Windows Phone”，“ iPad”，“ iPod”）;
var flag = true;
for（var v = 0; v <adments.length; v ++）{
if（useragentinfo.indexof（代理[v]）> 0）{
flag = false;
休息;
}
}
返回標誌；
}
/ *調整圖片大小 */
函數自動圖像（maxWidth，maxheight，objimg）{
var img = new Image（）;
img.src = objimg.src;
var hratio;
var Wratio;
var比率= 1;
var w = img.width;
var h = img.height;
wratio = maxWidth / w;
hratio = maxheight / h;
if（maxWidth == 0 && maxheight == 0）{
比率= 1;
} else if（maxWidth == 0）{//
if（hratio <1）比率= hratio;
} else if（maxheight == 0）{
if（wratio <1）比率= wratio;
} else if（wratio <1 || hratio <1）{
比率=（wratio <= hratio？wratio：hratio）;
}
如果（比率<1）{
w = w *比率;
h = h *比率;
}
objimg.height = h;
objimg.width = w;
}
/ *設置不同設備的縮放策略 */
函數setimg（tagid，pcwidth，pcheight，appwidth，appheight）{
var tag = document.getElementById（tagid）;
var images = tag.getElementsbytagname（“ img”）;
for（var i = 0; i <images.length; i ++）{
如果（ispc）{
AutoresizeImage（PCWIDTH，PCHEIGHT，IMAGES [i]）;
}別的{
AutoresizeImage（AppWidth，AppHeight，Images [i]）;
}
}
}
window.onload = function（）{
setimg（'imgdiv'，300,0,300,0）;
}
</script>
</head>
<身體>
<div ID =“ imgdiv”>
<img src =“ http://192.168.1.116:9999/ffzx/news/20140205/015212022_1.jpg”/>
<div>
<img src =“ http://192.168.1.116:9999/ffzx/news/20140208/1386835169183.jpg”/>
</div>
</div>
<br>
</body>
</html>