摘要：
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>随机验证码校验</title> <style type="text/css"> #code{ width: 100px; height: 100px; back 阅读全文
摘要：
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>拖拽</title> <style type="text/css"> #box1{ width: 100px; height: 100px; backgroun 阅读全文