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  <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="content-type" content="text/html;charset=gb2312"> <title>全屏遮罩鎖屏效果</title> <style type="text/css"> #www_zzjs_net{visibility:hidden;position:fixed;top:0;left:0;z-index:1987;width:100%;height:100%;background:#000;filter:alpha(opacity=70);opacity:0.7;} /*IE6 fixed*/ * html{background:url(*) fixed;} * html body{margin:0;height:100%;} * html #www_zzjs_net{position:absolute;left:expression(documentElement.scrollLeft+documentElement.clientWidth-this.offsetWidth);top:expression(documentElement.scrollTop+documentElement.clientHeight-this.offsetHeight);} </style> <script language="javascript"> (function(){ // 獲取對象 var $ = function (id){ return document.getElementById(id); }; // 遍歷 var each = function(a, b) { for (var i = 0, len = a.length; i < len; i++) b(a[i], i); }; // 事件綁定 var bind = function (obj, type, fn) { if (obj.attachEvent) { obj['e' + type + fn] = fn; obj[type + fn] = function(){obj['e' + type + fn](window.event);} obj.attachEvent('on' + type, obj[type + fn]); } else { obj.addEventListener(type, fn, false); }; }; // 移除事件 var unbind = function (obj, type, fn) { if (obj.detachEvent) { try { obj.detachEvent('on' + type, obj[type + fn]); obj[type + fn] = null; } catch(_) {}; } else { obj.removeEventListener(type, fn, false); }; }; // 阻止瀏覽器默認行為 var stopDefault = function(e){ e.preventDefault ? e.preventDefault() : e.returnValue = false; }; // 獲取頁面滾動條位置 var getPage = function(){ var dd = document.documentElement, db = document.body; return { left: Math.max(dd.scrollLeft, db.scrollLeft), top: Math.max(dd.scrollTop, db.scrollTop) }; }; // 鎖屏 var lock = { show: function(){ $('www_zzjs_net').style.visibility = 'visible'; var p = getPage(), left = p.left, top = p.top; // 頁面鼠標操作限制 this.mouse = function(evt){ var e = evt || window.event; stopDefault(e); scroll(left, top); }; each(['DOMMouseScroll', 'mousewheel', 'scroll', 'contextmenu'], function(o, i) { bind(document, o, lock.mouse); }); // 屏蔽特定按鍵: F5, Ctrl + R, Ctrl + A, Tab, Up, Down this.key = function(evt){ var e = evt || window.event, key = e.keyCode; if((key == 116) || (e.ctrlKey && key == 82) || (e.ctrlKey && key == 65) || (key == 9) || (key == 38) || (key == 40)) { try{ e.keyCode = 0; }catch(_){}; stopDefault(e); }; }; bind(document, 'keydown', lock.key); }, close: function(){ $('www_zzjs_net').style.visibility = 'hidden'; each(['DOMMouseScroll', 'mousewheel', 'scroll', 'contextmenu'], function(o, i) { unbind(document, o, lock.mouse); }); unbind(document, 'keydown', lock.key); } }; bind(window, 'load', function(){ $('zzjs_net').onclick = function(){ lock.show(); }; $('www_zzjs_net').onclick = function(){ lock.close(); }; }); })(); </script> </head> <body> <button id="zzjs_net" style="position:absolute;left:50%;top:40%;">開啟鎖屏</button> <ol id="test"> <li>龍誠互聯，專業網站建設服務商！</li> </ol> <div class="migvcmv" id="www_zzjs_net"></div> </body> </html>