How to use CSS3 in IE7
Many developers will fully agree the fact designing and optimizing websites for older browsers like IE7 gives them eternal headaches. CSS3 is not supported by IE7, making the use of CSS3 in IE7 a very tricky aspect. We would therefore strongly advise you to make use of CSS3PIE which creates a hack to make IE7 believe CSS3 properties and features are compatible, ensuring in this way a proper website display. We strongly recommend this solution because it guarantees proper website display and proper older browser, like IE7, optimization.