左侧与顶部导航的实现

左侧导航

  
<!doctype html>
<html>
    <head>
        <title>左侧导航</title>
        /*<link rel ="shortcut icon" type="images/x-icon" href="2.jpg" >
        用于改变图标*/
        <style>
            *{margin:0;padding:0;}
            ul{
                position:relative;
                margin:100px;
                width:250px;
                list-style:none;
           		border:1px solid red;
            }
            ul li{
                
               height:40px;
               line-height:40px;
                font-size:14px;
                font-size:#ccc;
                background:rgba(0,0,255,0.5);
                text-indent:lem;
            }
            ul li:hover{/*鼠标上去之后的操作*/
                background:red;
            }
            ul li:hover div{
                display:block;
            } 
            ul li div{
                display:none;/**/
                position:absolute;
                top:0px;
                left:250px;
                height:600px;
                width:600px;        
                background:rgb(0,255,0);
            }
        </style>
    </head>
    <body>
        <ul>
            <li>1<div>
                1
                </div></li>
            <li>2<div>
                2
                </div></li>
            <li>3<div>
                3
                </div></li>
            <li>4<div>
                4
                </div></li>
            <li>5<div>
                5
                </div></li>
            <li>6<div>
                6
                </div></li>
        </ul>
    </body>
</html>

　　

顶部导航

  
<!doctype html>
<html>
    <head>
        <title>顶部导航</title>
        <style>
             *{margin:0;padding:0;}
            ul{
                
                margin:100px;
                height:40px;
                line-height:40px;
                width:600px;
                list-style:none;
           		border:1px solid red;
            }
            ul li{     
                float:left;
               position:relative;
                width:100px;
                font-size:14px;
                font-size:#ccc;
                background:rgba(0,0,255,0.5);
                text-indent:center;
            }
            ul li:hover{/*鼠标上去之后的操作*/
                background:red;
            }
            ul li:hover div{
                display:block;
            } 
            ul li div{
                display:none;/**/
                position:absolute;
                top:90px;
                left:0px;
                height:300px;
                width:100px;        
                background:rgb(0,255,0);
            }
            ul li div:after{
                position:absolute;
                top:-50px;
                left:0px;
                content:"";
                width:0px;
                height:0px;
                border:50px solid transparent; /*transparent透明*/
                border-bottom-color:red;
            }
        </style>
    </head>
    <body>
        <ul>
            <li>1<div>
                1
                </div></li>
            <li>2<div>
                2
                </div></li>
            <li>3<div>
                3
                </div></li>
            <li>4<div>
                4
                </div></li>
            <li>5<div>
                5
                </div></li>
            <li>6<div>
                6
                </div></li>
        </ul>
    </body>
</html>

　　

posted @ 2020-01-31 18:51  JZCTPP  阅读(315)  评论(0)    收藏  举报