摘要：
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>position_relative</title> <style> .div1{ background-color: #2eb1fc; width:100px; h 阅读全文
摘要：
处理多出来的div2--去掉div2父标签的边框 <!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>position_absolute</title> <style> .div1{ background-color 阅读全文
摘要：
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>position_absolute</title> <style> .div1{ background-color: #2eb1fc; width:100px; h 阅读全文
摘要：
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>position_ example</title> <style> .div1{ height:1500px; background-color:green; } 阅读全文
摘要：
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>float</title> <style> .outer{ background-color:blue; overflow:hidden; /*不用添加div，添加 阅读全文