js设自适应大小

 1.图片和表格自适应 

 <script>
        {#图片设置自适应#}
        var img_css = document.getElementsByTagName('img');
        for(i=0;i<img_css.length;i++)
        {
            img_css[i].style.display='block';
            img_css[i].style.maxWidth ='100%';
            img_css[i].style.height='';
            img_css[i].style.width='';
        }
        {#表格默认没有宽度和高度这样可以自适应#}
        var table_css = document.getElementsByTagName('table');
        for(i=0;i<img_css.length;i++)
        {
            table_css[i].style.height='';
            table_css[i].style.width='';
        }

</script>