<!DOCTYPE html><html><head><meta charset="UTF-8"><title>Document</title><style type="text/css">div{width: 200px;background-color: red;height:100px;position: relative;}</style><script type="text/javascript">window.onload=function (){var div=document.getElementById("DIV");var btn=document.getElementById("right");var timer=null;btn.onclick=function(){clearInterval(timer);timer=setInterval(function(){if(div.offsetLeft==400){clearInterval(timer);}else{div.style.left=div.offsetLeft+1+'px';}},50)};};</script></head><body><div id="DIV"></div><input type="button" value="right" id="right"></body></html>如果改了if(div.offsetLeft>=400) 則會在left:396px 停下來，這又是為什么？
clearInterval 為什么無效 ?
害羞長頸鹿
2016-06-21 23:54:50
