Javascript customization of dashboard images

We need two functions which can change the look of two specific dashboard images: First one is a pink circle: circle_function(rate) will help show the circle correctly. If circle_function(100) is called the circle will be full and 100 will write inside. if circle_function(99), it should be 99% full and 99 will write inside the circle. The function will only work for integer values between 0 and 100, inclusive. Second one is a green horizontal bar. The working will be the same as above. Attached image is for the work to be done. We'll send the PSD. Advanced Javascript&CSS is a must. The solution has to work with IE8 and up. We can accept a somewhat acceptable degrading for IE7. In IE6, the functions should at least still work somehow. But a much worse degrading is acceptable.