div按照屏幕尺寸（设备大小）进行缩放

body{
            width: 810px;
            height: 340px;
            margin: 0px;
            padding: 0px;
            background-color: #2e2423;
            display: none; /**先隐藏，缩放后再显示，防止闪烁**/
        }

<!--  脚本 -->
<script src="${rc.contextPath}/js/jquery/jquery-2.0.3.min.js"></script>
<script type="text/javascript">

    //缩放视图
    $(document).ready(function(){
        resizeDiv();
    });

    var resizeDiv = function(){
        var width = $(window).width();
        var height = $(window).height();
        var scaleX = width/810; //设备默认宽度为810px
        var scaleY = height/340; //设备默认高度为340px

        //按设备比例缩放div的比例
        var scaleFunc = "scale("+scaleX+","+scaleY+")";

        $('body').css({
            "transform":scaleFunc, //缩放比例
            "transform-origin":"left top", //缩放基点

            "-ms-transform":scaleFunc,     /* IE 9 */
            "-ms-transform-origin":"left top",

            "-moz-transform":scaleFunc,     /* Firefox */
            "-moz-transform-origin":"left top",

            "-webkit-transform":scaleFunc, /* Safari 和 Chrome */
            "-webkit-transform-origin":"left top",

            "-o-transform":scaleFunc,     /* Opera */
            "-o-transform-origin":"left top",
        });

        $('body').show();
    };
</script>