screen 对象当当获取屏幕而已 innethtml可以知道调整屏幕宽度

<div id='lidepeng' style="height: 100px;width: 100px;">

</div>
<script type="text/javascript">
var screen =screen.width;
var lidepeng=document.getElementById('lidepeng');
lidepeng.style.position='absolute';
lidepeng.style.left= screen-100+'px';

// alert(screen);
// lidepeng.style.position=screen-100;

</script>

<script type="text/javascript">
  var screen=  window.innerWidth;

// alert(11111);
   // var screen=  window.innerWidth；
   // alert(screen);
var lidepeng=document.getElementById('lidepeng');
 lidepeng.style.position='relative';
 lidepeng.style.left= screen-100+'px';

// alert(screen);
// lidepeng.style.position=screen-100;

</script>