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2021-08-28 09:58:04

水平线设置宽度，位置

<!docutype html><html><head><meta charset="UTF-8"><title>设置水平线的宽度，高度，颜色</title></head><body><hr width="130">&

2021-08-27 16:22:44

hr水平线制作简单水平线表格

<!doctype html><html><head><meta charset="UTF-8"><title>水平线标签</title></head><body><h1 al

2021-07-01 13:52:29

HTML的上标和下标签

<html><head><meta charset="gb2312"><title>上标和下标</title></head><body><h1 align="center">上标和下标标签</h1><h3 align="center">在数字中计算</h3><h3 align="center

2020-10-25 15:29:52

点击按键方框内颜色色变成所点击按钮要求颜色

<html><head><title>点击颜色</title><script type="text/javascript">function fun1(){ var xm=document.getElementById("div1"); xm.style.background="red";}function fun2(){ var xm=document.getE

2020-10-19 22:58:46

<html><head><title>动感相册</title><style type="text/css"><!--.background{width:500px;height:500px;background-color:#666;margin:10px auto;border:1px solid red;}li{width:50px;height:50px;overflow:hidden;margin:10

2020-10-16 23:13:34

DIV的嵌套

<html><head></head><body><div style="width:400px; height:150px; background-color:gray;color:white;font-size:20px" >hello world!<div style="width:300px;height;50px;background-color:yellow;color:blue;font

2020-10-14 22:26:44

z-index使用的时候只有使用定位才有效

<html><head></head><body><div style="height:40%;width:40%;background-color:#999;z-index:2;position:absolute;">aaa</div><div style="height:40%;width:40%;background-color:#0CF;position:absolute;left

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