
1.如何在每三个菜单列表项下添加一个下拉列表,我可以在其中添加一些文本,图像和位置
body { background-color:lightgray; Font-family: Tahoma,Cambria;}#header { height: 300px;}#logo { position: absolute; margin: auto; left: 0; right: 0; top: 0; }#menu { position: relative; max-height:60px; Font-family: Cambria; Font-style: bold,italic; text-align: center;}#menu ul { List-style-type: none; margin: 0; padding: 0; float:none;}#menu li a { display:inline-block; color:#009CFF; padding: 10px 200px; overflow:hidden; Transition: 0.3s; Font-style:italic; Font-weight: bold; text-decoration:none; margin: 0 0 0 0;}#menu li a:hover { background-color: dimgray; color: deepskyblue;}body { border: 2px solID dark-gray ;}l> <!DOCTYPE HTML ><HTML> <head> <Title></Title> <link rel="shortcut icon" type="image/x-icon" href="favicon.ico" /> </head> <body> <header> <img src = "http://via.placeholder.com/350x150" ID = "logo" alt = "Antomatik logo"/> </header> <div ID = "menu"> <ul> <li > <a href="antomatik/onama.HTML">O nama</a></li> <li > <a href="antomatik/povijest.HTML">Povijest</a></li> <li > <a href="antomatik/kontakt.HTML">Kontakt</a></li> </ul> </div> <footer> </footer> </body></HTML>解决方法 它的标题,而不是#header
body { background-color:lightgray; Font-family: Tahoma,Cambria;}header { height: 100px;}#logo { position: absolute; margin: auto; left: 0; right: 0; top: 0; }#menu { position: relative; max-height:60px; Font-family: Cambria; Font-style: bold,italic; text-align: center;}#menu ul { List-style-type: none; margin: 0; padding: 0; float:none;}#menu li a { display:inline-block; color:#009CFF; padding: 10px 200px; overflow:hidden; Transition: 0.3s; Font-style:italic; Font-weight: bold; text-decoration:none; margin: 0 0 0 0;}#menu li a:hover { background-color: dimgray; color: deepskyblue;}body { border: 2px solID dark-gray ;}l> <!DOCTYPE HTML ><HTML> <head> <Title></Title> <link rel="shortcut icon" type="image/x-icon" href="favicon.ico" /> </head> <body> <header> <img src="http://via.placeholder.com/300x100" ID = "logo" alt = "Antomatik logo"/> </header> <div ID = "menu"> <ul> <li > <a href="antomatik/onama.HTML">O nama</a></li> <li > <a href="antomatik/povijest.HTML">Povijest</a></li> <li > <a href="antomatik/kontakt.HTML">Kontakt</a></li> </ul> </div> <footer> </footer> </body></HTML>总结
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