这个代码是没问题的
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>导航菜单</title> <style type="text/css"> * { margin: 0; padding: 0; font-size: 14px; } a { color: #333; text-decoration: none } ul { list-style: none; height: 30px; border-bottom: 5px solid #F60; margin-top: 20px; padding-left: 50px; } ul li { float: left } ul li a { display: block; height: 30px; text-align: center; line-height: 30px; width:120px; background: #efefef; margin-left: 1px; } a.on, a:hover { background: #F60; color: #fff; } </style> <script> window.onload=function(){ wrap('a'); } function wrap(obj){ var aA=document.getElementsByTagName(obj); for(var i=0; i<aA.length; i++){ aA[i].onmouseover=function(){ var This=this; clearInterval(This.time); This.time=setInterval(function(){ This.style.width=This.offsetWidth+8+"px"; if(This.offsetWidth>=160) clearInterval(This.time); },30) } aA[i].onmouseout=function(){ clearInterval(this.time); var This=this; this.time=setInterval(function(){ This.style.width=This.offsetWidth-8+"px"; if(This.offsetWidth<=120){ This.style.width='120px'; clearInterval(This.time); } },30) } } } </script> </head> <body> <ul> <li><a class="on" href="#">首 页</a></li> <li><a href="#">新闻快讯</a></li> <li><a href="#">产品展示</a></li> <li><a href="#">售后服务</a></li> <li><a href="#">联系我们</a></li> </ul> </body> </html>
但是如果我让JS变为外部链接就不行了。代码如下
html部分:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>导航菜单</title> <style type="text/css"> * { margin: 0; padding: 0; font-size: 14px; } a { color: #333; text-decoration: none } ul { list-style: none; height: 30px; border-bottom: 5px solid #F60; margin-top: 20px; padding-left: 50px; } ul li { float: left } ul li a { display: block; height: 30px; text-align: center; line-height: 30px; width:120px; background: #efefef; margin-left: 1px; } a.on, a:hover { background: #F60; color: #fff; } </style> <script src="js/wrap.js"> window.onload=function(){ wrap('a'); } </script> </head> <body> <ul> <li><a class="on" href="#">首 页</a></li> <li><a href="#">新闻快讯</a></li> <li><a href="#">产品展示</a></li> <li><a href="#">售后服务</a></li> <li><a href="#">联系我们</a></li> </ul> </body> </html>
JS部分:
function wrap(obj){ var aA=document.getElementsByTagName(obj); for(var i=0; i<aA.length; i++){ aA[i].onmouseover=function(){ var This=this; clearInterval(This.time); This.time=setInterval(function(){ This.style.width=This.offsetWidth+8+"px"; if(This.offsetWidth>=160) clearInterval(This.time); },30) } aA[i].onmouseout=function(){ clearInterval(this.time); var This=this; this.time=setInterval(function(){ This.style.width=This.offsetWidth-8+"px"; if(This.offsetWidth<=120){ This.style.width='120px'; clearInterval(This.time); } },30) } } }
为什么的?
pardon110