We all are aware of the popularity of HTML5 these days in the web-world. HTML5 and CSS3 are hot topics for a software developer which is getting huge attention from all around. All the browser companies are working day and night to make their browser in line with HTML5. The latest browser of Internet Explorer i.e. IE9 also supports a lot of HTML5/CSS3 standards nowadays.
However the biggest challenge in front of every software developer is to make HTML5 work on older versions of IE. The most important difference between HTML5 and HTML4 is the usage of custom tags in HTML5. We have Tags like