Internet Explorer 8
Internet Explorer 8 is more standards compliant than any earlier version of Internet Explorer. This means that pages you have written to standards will work better with Internet Explorer 8. Cross-browser compatibility is much easier because you don’t have to modify your pages as much to display on specific browsers.
Internet Explorer 8 fully supports CSS 2.1 and more of CSS 3.
HTML and DOM Support
Internet Explorer 8 has improved support for HTML 4.01 and 5, also for DOM 2 and 3.
In terms of compatibility between Internet Explorer 7 and Internet Explorer 8, this area will cause you the most problems. Some objects you used with Internet Explorer 7 have changed to work according the various standards specifications. In other words, some methods, properties, and so on that worked in a non-standard way in Internet Explorer 7 now comply with standards in Internet Explorer 8.
Better AJAX Support
Internet Explorer 8 more easily supports backward navigation of page fragments. It provides better communication between pages, frames, sites, and domains.
Developer Tools Built In
You may have used downloaded and used the Internet Explorer Developer Tool bar.
You can make your Web services available to users as Accelerators. Users can add Accelerators to Internet Explorer 8 and use them anywhere they browse.
Like an RSS feed, you can set up portions of your Web pages that contain frequently updated information as Web Slices for your users.
Internet Explorer 8 has improved the search experience for end users. Many search engines offer search suggestions as users type.
Internet Explorer 7
Windows Internet Explorer 7 continues the ongoing Internet Explorer commitment to provide enhanced security and privacy, increased compatibility with industry standards, additional browser features, and improved usability for platform developers.
Building on the broad success of Microsoft Internet Explorer 6, Internet Explorer 7 focuses on three key areas:
Internet Explorer 7 RSS feeds help you access information quickly and directly on the Web, providing automatic discovery of new feeds on Web pages, basic Web feed reading ability, and basic support for saving Web feeds as favorites.
Microsoft Phishing Filter
Internet Explorer 7 includes functionality to protect users against phishing attacks from hostile sites.
Windows Vista Protected Mode reduces the severity of threats to both Internet Explorer and extensions running in Internet Explorer by eliminating the ability to silently install malicious code through software vulnerabilities.
Secure Sockets Layer (SSL)
Internet Explorer 7 makes it easier to see if Web transactions are secured by SSL or Transport Layer Security (TLS). A security report icon now appears to the right of the address bar when you view a page using a Secure Hypertext Transfer Protocol (HTTPS) connection.
Microsoft ActiveX Opt
In Internet Explorer 7 disables all ActiveX controls that are not used in Internet Explorer 6.
Cascading Style Sheets (CSS) Updates
Internet Explorer 7 features improved CSS, Level 2 (CSS2) support for Selectors (first-child, adjacent, attribute, and child selectors) and Fixed Positioning.
Portable Network Graphics (PNG)
Internet Explorer 7 adds support for Alpha Channel Transparency to PNG, so that Web designers can implement advanced overlays and innovative graphical designs.
XMLHTTP Native Support
Internet Explorer 7 implements a version of XMLHTTP that is a native scriptable object instead of an object. Users can now have ActiveX controls switched off and still maintain a client-side connection with a server.
Internationalized Domain Name (IDN)
Internet Explorer 7 includes complete support for RFC-3490 on Internationalizing Domain Names in Applications (IDNA) World Wide Web link in all browser functions.
Internet Explorer 7 uses tabs to organize and manage groups of Web pages. Users can select an individual page or a group of pages (a tab group) to open as their home page.
HTML 4.01 Support
Internet Explorer 7 recognizes the ABBR tag from HTML 4.01.
The Select control is now a windowless control. This change enables z-order and zoom to work correctly.
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