动态添加事件

我制作一个名为s的函数，然后它在两个浏览器中都运行良好。 所以，我想我只是好奇第一行是否是一个仅IE的 语法或什么。 解决方案 " David" < DK **** @ hotmail.com>在消息中写道 新闻：Ls ******************** @ comcast.com ... 我有一个单行脚本来将onunload事件处理程序添加到文档的正文中。该脚本如下： document.getElementsByTagName（" BODY"）[0] .onunload = function s（） {alert（" s"）} 现在很明显，我将警报（s）部分用于调试目的，只是为了确保错误不在我将要运行的任何代码中。这个行在IE6中运行得很好但在Firefox中却没有。但是，如果我用以下内容替换该行： document.getElementsByTagName（" BODY"）[0] .onunload = s 我制作一个名为s的函数，然后它在两个浏览器中都运行良好。所以，我想我只是好奇第一行是否只是一个IE语言或什么。 第二个脚本行应如下所示 document.getElementsByTagName（" BODY"）[0] .onunload = s（ ） 后括号括起来。 不，第一个例子确实是错的并且IE错误地传递了 函数对象，应该是： obj.onunload = function（）{......} //或者 obj.onunload = FUNCTIONHEREWITHNOARGS; 你也可以使用DOM obj.addEventListener（）或IE obj.attachEvent（）; Danny - 使用Opera的革命性电子邮件客户端： http://www.opera.com/mail/ David写道：" David" < DK **** @ hotmail.com>在消息中写道新闻：Ls ******************** @ comcast.com ... 我有一个单行脚本来将onunload事件处理程序添加到文档的正文中。该脚本如下： document.getElementsByTagName（" BODY"）[0] .onunload = function s（） {alert（" s"）} 该特定变体只会影响IE用户。尝试： window.onunload = function（）{alert（'s''）; } b / b 函数s（）{ alert（'s''）; } window.onunload = s; 这两个都会惹恼IE的用户。 window.onunload是DOM级别0，不属于W3规范。 Mozilla 似乎允许动态添加正文onunload但是当页面卸载时不​​执行执行它。在源代码中存在onunload HTML，它似乎按预期工作。 动态添加window.onunload似乎在Mozilla和IE中工作。 /> < URL：http：//www.mozilla.org/docs/dom/domref/dom_window_ref75.html> 使用onunload不鼓励一般网页，它的主要用途最初是创建''弹出地狱''。我希望 你的意图更加光荣。 [...] - Rob I have a one-line script to add an onunload event handler to the body of thedocument. The script is as follows: document.getElementsByTagName("BODY")[0].onunload=function s() {alert("s")} Now obviously, I put the alert("s") part in for debugging purposes, just tomake sure the error wasn''t in any code I was going to be running. This lineworks just fine in IE6 but in Firefox it doesn''t. However, if I replacethat line with the following: document.getElementsByTagName("BODY")[0].onunload=s and I make a function called s, then it works just fine in both browsers.So, I guess I''m just curious as to whether the first line is an IE-onlysyntax or what. 解决方案 "David" <dk****@hotmail.com> wrote in messagenews:Ls********************@comcast.com...I have a one-line script to add an onunload event handler to the body ofthe document. The script is as follows: document.getElementsByTagName("BODY")[0].onunload=function s() {alert("s")} Now obviously, I put the alert("s") part in for debugging purposes, just to make sure the error wasn''t in any code I was going to be running. This line works just fine in IE6 but in Firefox it doesn''t. However, if I replace that line with the following: document.getElementsByTagName("BODY")[0].onunload=s and I make a function called s, then it works just fine in both browsers. So, I guess I''m just curious as to whether the first line is an IE-only syntax or what. That second script line should read as follows document.getElementsByTagName("BODY")[0].onunload=s() with the parentheses after s.No, the 1st example is indeed mistaken and IE is incorrectly passing thefunction object, should be: obj.onunload=function(){ ...... } // orobj.onunload=FUNCTIONHEREWITHNOARGS; You can also use DOM obj.addEventListener() or for IE obj.attachEvent(); Danny --Using Opera''s revolutionary e-mail client: http://www.opera.com/mail/David wrote: "David" <dk****@hotmail.com> wrote in message news:Ls********************@comcast.com...I have a one-line script to add an onunload event handler to the body ofthe document. The script is as follows:document.getElementsByTagName("BODY")[0].onunload=function s(){alert("s")}That particular variant will pester IE users only. Try: window.onunload = function () { alert(''s''); }; or function s (){alert(''s'');} window.onunload = s; Both of which will annoy users of IE also. window.onunload is DOM level 0 and not part of the W3 spec. Mozillaseems to allow the body onunload to be added dynamically but doesn''texecute it when the page unloads. Where onunload exists in the sourceHTML, it seems to work as expected. Adding window.onunload dynamically seems to work in Mozilla and IE. <URL:http://www.mozilla.org/docs/dom/domref/dom_window_ref75.html> The use of onunload is not encouraged for general web pages, itsprincipal use initially having been to create ''pop-up hell''. I hopeyour intentions are more honourable. [...]--Rob 这篇关于动态添加事件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！