The window.onload function is widely supported by popular browsers. Make sure you provide a valid email address, JavaScript window.open: Display Modal Popup Window, Advertising campaigns or links to other sites. rev 2021.2.3.38486, Stack Overflow works best with JavaScript enabled, Where developers & technologists share private knowledge with coworkers, Programming & related technical career opportunities, Recruit tech talent & build your employer brand, Reach developers & technologists worldwide. Not being able to resize or scroll a popup window might frustrate some users. 0. Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, PHP, Python, Bootstrap, Java and XML. The ModalPopup control in the AJAX Control Toolkit offers a simple way to create a modal popup using client-side means. Basic JavaScript Popup Script. Here is the basic script for generating a popup window: To protect the privacy of the users, there are limitations to how JavaScript can access this object. Another frequent usage of JavaScript onload is to apply it to automatically check visitors' web browsers and adjust the way websites will be loaded. Therefore, when you try to set attributes that are not standard, you should use the JavaScript setAttribute function. The popup button will be just under the visitor’s eye. PayPal标识中心 在网站上显示PayPal品牌标识，提高客户信任度。 PayPal标识、图片和按钮触手可及。 PayPal标识和横幅可以向客户表明您使用PayPal安全地处理付款，轻松提升客户对您的信任度。 You can add your comment about this article using the form below. To learn more, see our tips on writing great answers. I have put the following code on my page, but I must be missing something. if(window.opener != null && !window.opener.closed). @Larry Hipp how can i change it to fit the size of the screen? The comment is now awaiting moderation. Here is the code: