Opera Help JavaScript JavaScript is a scripting language used to add functions to webpages, such as manipulating browser windows. Turn JavaScript on or off ¶ In rare cases, JavaScript may be used intrusively to perform certain actions you may find annoying. For these cases, you can turn it off completely, but note that this will often mean that some webpages will not work as designed. To turn JavaScript off, go to Settings > Quick Preferences and uncheck "Enable JavaScript". To turn it back on,...

Opera Help Java Some sites use Java to offer interactive content on webpages. If you do not have Java installed, Opera will automatically offer to take you to a download site when you encounter such content. Related topics ¶ Plug-ins Also see: Plug-in documentation Copyright © 1995 - 2012 Opera Software ASA. All rights reserved....

Opera Help Browser identity Sometimes, if you have problems displaying a site in Opera, or have received a message saying that you are using an unsupported browser, you may be able to resolve issues by changing how Opera presents itself to the site. When a web browser connects to a website, it tells the site which browser it is. Some websites will then provide content tailored for particular browsers, not taking other browsers into account. However, as browsers are in constant development, assum...

Opera Help ActiveX and VBScript support in Opera The Opera browser does not have in-built support for Microsoft's Windows-specific ActiveX technology or the VBScript scripting language. Opera does however support the use of Netscape compatible plug-ins, which can provide similar functionality to most ActiveX controls. Java is also supported (provided it is installed), and is the most widely used language for embedded programs on the web. Opera also supports JavaScript, which is the most common s...

Opera Help Site preferences Sometimes you may want to change settings permanently for one website only. If you know that one of your favorite websites relies on using pop-ups, for example, using Opera's site preferences you can allow all pop-ups from this specific site while still blocking them on other sites. You may also want to allow trusted websites, such as your bank, to use more technologies than, for example, a game site you just happened to stumble across. To add or edit site preferences...

Index listing – Opera Help A-Z Index listing The most commonly used words? A Access keys Account Account properties ActiveX Address bar Animated images Application cache Audio Auto-update B Backup BitTorrent Block content Bookmark Bookmarks bar Browser identity Browser layout map C Cache Camera Certificates Chat Colors Contacts Context menu Cookies Crashes Crashlog D Default browser Delete private data Developer Tools Dictionary Display modes Do not track Downloads Drag and drop Dragonfly E ...

Opera Help Storage Offline applications ¶ The idea of Offline Applications is to make your favorite online services, such as web mail, available even when you are offline . Naturally in this situation you will not be able to send mail, but you should be able to read your old messages, and compose new messages that will be sent when you come back online. To use a website when offline, you need to have access to many of its resources, including the HTML, CSS, and JavaScript that form the layout a...

Opera Help Dragonfly What is Opera Dragonfly? ¶ Opera Dragonfly is a tool for developing and debugging local and remote webpages. It includes a DOM view of webpages and highlighting of elements. You can step through your JavaScript code, and quickly inspect changes to your CSS styles. You can debug your extensions and widgets , and study your application's impact on network resources. One of the standout features of Opera Dragonfly is remote debugging. Remote debugging makes it possible to debu...

Opera Help Preferences Opera's preference dialog holds a great number of useful settings to change the browser behavior to suit you. Access the preferences by going to Settings > Preferences or by pressing Ctrl+F12 . Preferences tabs ¶ The Preferences dialog has 5 tabs (note that the Advanced tab is split into distinct sub-topics): Tab Allows you to change settings for ... General Start up tabs Home page Pop-ups Language Forms Passwords Personal data saved for forms Search Search engines and k...

Opera Help Menus The key Opera functions are available from the main menu. Note that nearly every element of the browser can be right -clicked to display a context menu offering further options. Main menu To view the main menu, click on the big red "O" icon on the top left of the browser. Tabs and Windows New tabs and windows, closed tabs, and sessions Page Edit, display, and developer tools Print Print , print options, and print preview Bookmarks Bookmarks and bookmark manager History History ...