网页宽度

页面box不要写宽度或 width:100% 之类的 去掉

头部加上下面代码：

<meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=0.5, maximum-scale=2.0, user-scalable=yes" />

图片宽度

<script type="text/javascript">

function init() {

var jian = 30;

var w = document.body.clientWidth - jian;

var pic = document.getElementsByTagName("img");

for (var i = 0; i < pic.length; i++) {

var width2 = pic[i].width;

var height1 = pic[i].height;

if (width2>w) {

pic[i].width = w;

pic[i].height = height1 * w / width2;

}

}

}

</script>