1.基础回顾
如何让一个段javascript在文档加载后执行,(因为自己忘了,所以顺便复习一下)
window.onload = function(){};
<!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>无标题文档</title> <style type="text/css"> *{ margin:0px; padding:0px;} #menu{ background-color:#eee; width:600px; height:40px; margin:0 auto;} ul{ list-style:none;} ul li{ line-height:40px; text-align:center; position:relative; float:left;} a{ text-decoration:none; color:#000; display:block; width:90px;} a:hover{ color:#FFF; background-color:#666;} ul li ul li{ float:none;margin-top:2px; background-color:#eee; } ul li ul{width:90px; position:absolute; left: 0px;top: 40px; display: none} /** ?*/ /**ul li:hover ul{display: block}*/ </style> <script type="text/javascript" > window.onload = function(){ alert("load ok"); } function optionShow(li) { var submenu = li.getElementsByTagName("ul")[0]; submenu.style.display = "block"; } function optionHide(li) { var submenu = li.getElementsByTagName("ul")[0]; submenu.style.display = "none"; } </script> </head> <body> <div id="menu"> <ul> <li id="sy"><a href="#">首页</a></li> <li id="kcdt"><a href="#">课程大厅</a> <!-- ?--> <ul> <li><a href="#">JavScript</a></li> <li><a href="#">JQuery</a></li> </ul> </li> <li onmouseover="optionShow(this);" onmouseout="optionHide(this);"><a href="#">学习中心</a> <ul> <li><a href="#">视频学习</a></li> <li><a href="#">案例学习</a></li> <li><a href="#">交流平台</a></li> </ul> </li> <li><a href="#">经典案例</a></li> <li><a href="#">关于我们</a></li> </ul> </div> </body> </html>
原创文章,作者:ItWorker,如若转载,请注明出处:https://blog.ytso.com/15407.html