onunload

问题 this is my first post and I'm a JS novice, so please forgive my ignorance... Heres my question, its in two parts: 1.) At onunload I want an alert that asks the user if they would like to go to a related URL. The code I'm using works, but it open the URL in a new window and this can be blocked by a pop-up blocker even though the user has opted-in. Is there a way to have it open in the same window and negate the pop-up blocker? 2.) is there a way to take the onunload function out of the body

问题 I want to fire onunload event to do some clean up operations, I have multiple tabs(Navbar) showing multiple links to different web pages,my problem is that even when I'm in some other page my unload function which is in tag of some other jsp is fired. Please help to resove this, I want unload function to be called when user closes browser in that page. 回答1: I'm not sure how you got the onunload event to work....The problem I've found with using the onunload event is that it is fired after the

问题 there is an alternative to the Javascript onUnload ? I use JSP Jakarta Struts framework with a Servlets . I must know, when is window closing, because not everyone clicks on Logout button. How do you handle it in your applications? 回答1: Generally speaking, it's impossible to determine conclusively whether a visitor is still "using" (or even looking at) your page. Once the browser has downloaded the page, it's no longer in contact with the server at all, so the page could stay open for a few

问题 Having not any answers to my previous questions about using javascript to measure page turn times, I'm going to start writing my own code (!). To measure the length of tie it takes, I'm proposing dropping a cookie containing a timestamp when the user browses away from a page, then in a subsequent page, comparing that time with 'now' and sending back a request to a URL which will log the interval. It seems that there are 2 possible handlers I could associate the first block of code with - the

问题 I have a website with master page. I want to catch a user trying to close the browser/tab. When I try using onunload in the body tag, it fires not only when I try closing the browser, but also when I navigate to another page. Any idea how to only catch the event of closing the browser? 回答1: You can't distinguish closing the browser from navigating to another page. In both cases the current page is unloaded. update: maybe you can handle some cases with some jquery, i.e. whenever a link is

问题 This code will open go.com in popup window: <a href="javascript:void(0)" onClick="javascript:window.open('http://go.com','','status=yes,scrollbars=yes,toolbar=no,menubar=no,location=no ,width=300px,height=300px')">open</a> and I want to use alert('closed!') in main page, when popup is closed and I can't edit popup page for use onunload="alert('closed!')" , because the popup page is an external page and I can't change the code like var mywindow = window.open('http://go.com') ... Thanks. 回答1:

问题 I have a Vaadin 7 application where I need to reliably detect a user leaving or navigating away from a page in order to carry out some cleanup. My aim is to have the page pop up a confirmation dialog on browser/tab close, and if the user chooses to leave the page, then at that point I perform the cleanup operation. I am fairly inexperienced at JavaScript, but from what I have discovered 'onbeforeunload' and 'onunload' are the functions to use. At this point in time, I am using the following

问题 It's a known fact that a lot of websites use javascript codes to prevent from browsing them using iframes. I would like then my iframe to behave like this: if the site doesn't have such a code and isn't trying to redirect the user, its content should be shown in the iframe. But if it's trying to redirect, it should be opened in a new tab (just like links with target="_blank"). Is it possible to use onUnload or any other techniques to do such a thing? Thanks in advance, Michael. 回答1: This will

问题 I was just reading how to check users leave a page earlier on when suddenly I thought of performing AJAX when user leaves the page to send analytical data back to the server. Is performing AJAX on the onunload event a good or bad practice/implementation? 回答1: Performing AJAX calls on unload does not work very well in all situations. Usually, the web browser closes the panel almost immediately and the AJAX call may be lost. If you want to send analytical data, I suggest to send them in advance

问题 Javascript - document.location or window.location or window.location.href or location.href does not work in Google Chrome 6 and 7(i didnt test lowers versions) when called from the window/body unload event. Both the ways seems to work fine with IE, Firefox and Safari browsers. Through more testing i was able to see that this redirect actually works in chrome when done through a click event or any other. However when this is called in the body unload event. it does not work. Sample Code: <html