<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8">...
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> &...
<!DOCTYPE html> <html> <head> <meta charset="utf-8" /> ...
<!DOCTYPE html> <html lang="en"> <head> <title>瞌睡小鸟按钮特效</title&g...
点击下面的运行看效果：<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-...
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> &nbs...
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8...
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8">...
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> &nbs...
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8">...