例1
代码如下 | 复制代码 |
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <html><head> <title> New Document </title> </head> <script language="javascript"> function RunOnBeforeUnload() {window.onbeforeunload = function(){ return '将丢失未保存的数据!'; } } </script> <body onload="RunOnBeforeUnload()"> 刷新,关闭,后退,F5 测试 </body> </html> |
虽然onbeforeunload这个事件已经Web标准被淘汰,但目前能实现这个效果的也就只有这个事件.还好浏览器都能很好的支持.
测试结果:
IE6.0,FireFox,Chrome通过
上面只是给用户有提示,下面是完全禁止这些操作了
代码如下 | 复制代码 |
<script language="javascript"> //禁止用F5键 function document.onkeydown() { if ( event.keyCode==116) { event.keyCode = 0; event.cancelBubble = true; return false; } } //禁止右键弹出菜单 function document.oncontextmenu() { return false; } //下面代码实现全屏显示 function window.onload(){ var Request = new Array();//保存参数 var s = location.search.substring(1); if (s && s!=""){ var list = s.split("&"); for (var i=0; i < list.length; i++){ var pair = list[i].split("="); if (pair[0] && pair[0] !=""){ Request[unescape(pair[0])] = unescape(pair[1]); } } } var fullscreen=Request["fullscreen"]; if(fullscreen!="yes"){ var file =self.location; var a = window.open("about:blank","","fullscreen=yes") self.opener=null self.close() a.location=file + "?fullscreen=yes"; } } </script> <script language="Javascript"><!-- //屏蔽鼠标右键、Ctrl+N、Shift+F10、F11、F5刷新、退格键 //Author: meizz(梅花雨) 2002-6-18 function document.oncontextmenu(){event.returnValue=false;}//屏蔽鼠标右键 function window.onhelp(){return false} //屏蔽F1帮助 function document.onkeydown() { if ((window.event.altKey)&& ((window.event.keyCode==37)|| //屏蔽 Alt+ 方向键 ← (window.event.keyCode==39))) //屏蔽 Alt+ 方向键 → { alert("不准你使用ALT+方向键前进或后退网页!"); event.returnValue=false; } /* 注:这还不是真正地屏蔽 Alt+ 方向键, 因为 Alt+ 方向键弹出警告框时,按住 Alt 键不放, 用鼠标点掉警告框,这种屏蔽方法就失效了。以后若 有哪位高手有真正屏蔽 Alt 键的方法,请告知。*/ if ((event.keyCode==8) || //屏蔽退格删除键 (event.keyCode==116)|| //屏蔽 F5 刷新键 (event.ctrlKey && event.keyCode==82)){ //Ctrl + R event.keyCode=0; event.returnValue=false; } if (event.keyCode==122){event.keyCode=0;event.returnValue=false;} //屏蔽F11 if (event.ctrlKey && event.keyCode==78) event.returnValue=false; //屏蔽 Ctrl+n if (event.shiftKey && event.keyCode==121)event.returnValue=false; //屏蔽 shift+F10 if (window.event.srcElement.tagName == "A" && window.event.shiftKey) window.event.returnValue = false; //屏蔽 shift 加鼠标左键新开一网页 if ((window.event.altKey)&&(window.event.keyCode==115)) //屏蔽Alt+F4 { window.showModelessDialog("about:blank","","dialogWidth:1px;dialogheight:1px"); return false; } } </script> |
时间: 2024-09-22 01:03:01