Internet Explorer created by Microsoft has been the Web browser more popular for many years. But the gap is reducing this with the release of Mozilla Firefox, developed by an open source community. At last count it is said that there are 64 million users who use Firefox as your primary browser. They grow in large numbers every day. Therefore, the problem with browser compatibility is in its maximum importance. The way in which browsers are built, they can show a slightly different Web page. For example, the IFRAME tag is shown perfectly in Internet Explorer but not shown in Firefox.
This is only one of many cases of compatibility of browsers. Therefore, webmasters must ensure that the Web page can be seen both in Internet Explorer and Firefox. If you don’t, they risk losing a large percentage of users. There is nothing worse than visiting a Web site and can not see it correctly in a browser in particular. The solution for webmasters is to make all pages XHTML from transition. Web sites that are governed by this, are more likely to be considered correctly in all major browsers. XHTML is the language of today and already replaced HTML. XHTML was released in January of the year 2000. XHTML is not difficult to learn language, it is basically identical to HTML, but the main difference is that the XHTML tags always have a closing tag. For example, an HTML IMG tag has no end tag.