<!doctype html><html><head><meta charset="utf-8"><title>webrx-title</title><script src="js/jquery-1.11.2.min.js"></script><style>#iii{display:block;position:absolute;}</style><script>$(document).ready(function(e) {function aa(){var pos= $('#iii').position();if(pos.left==200){$('#iii').animate({left:0},'fast');}else{$('#iii').animate({left:200},'fast');}}$('.left').click(aa);setInterval(aa,1000);});</script></head><body><input type="button" value="right--200" class="left"><img src="images/flower.jpg" id="iii" width="120"></body></html>
id 一定要用position:absoult;