<!DOCTYPE html><html> <head> <meta charset="UTF-8"> <title></title> <style type="text/css"> div { width: 100px; height: 50px; margin: 10px; background: red; } </style> <script type="text/javascript"> window.onload = function() { var odiv = document.getElementsByTagName("div"); for (var i = 0; i < odiv.length; i++) { odiv[i].timer = null; odiv[i].onmouseover = function (){ start(this, 400) } odiv[i].onmouseout = function() { start(this, 100) } } function start(obj, wd) { clearInterval(obj.timer) obj.timer = setInterval(function() { var speed = (wd - obj.offsetWidth) / 6 speed = speed > 0 ? Math.ceil(speed) : Math.floor(speed); if (obj.offsetWidth==wd) { clearInterval(obj.timer); } else { obj.style.width = obj.offsetWidth + speed + "px" } }) } } </script> <script type="text/javascript"> </script> </head> <body> <div id=""></div> <div id=""></div> <div id=""></div> </div> </body></html>
if (obj.offsetWidth==wd) 在這段代碼中如果把==之間加一個空格的話,報錯是為什么
Youruncle
2016-08-11 17:14:45
