摘要:
定时器轮寻 <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <div id="a"> 北京欢迎您,为你开天辟地</div> <script> func 阅读全文
摘要:
position_fixed固定在某一个页面上 <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style> .pg_head{ height: 60px; background 阅读全文
摘要:
优先级 <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style> .a1 { background-color: aqua; height: 58px; } .a2 { fo 阅读全文
摘要:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <!--id选择器--> <style> #i{ background-color: bisque ; height: 48px; 阅读全文