fallback

I have this layout I am working on. It strongly depends on CSS calc to do the necessary calculations. width: -webkit-calc(50% - 20px); width: -moz-calc(50% - 20px); width: calc(50% - 20px); Now, I can't get this to work in Safari. Is there something I'm doing wrong? And also, is there a way I can introduce a fall-back mechanism for browsers that don't support it? Percentage wont do a good job, since I have to subtract the object in the middle, from the two on the side. Thanks. The way I solved this problem, is introducing a pure CSS fall-back, that older browsers that don't support CSS calc

This question already has an answer here: Best way to use Google's hosted jQuery, but fall back to my hosted library on Google fail 23 answers I’m using a CDN for the following javascript: https://ajax.googleapis.com/ajax/libs/jquery/1.5.1/jquery.min.js https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.10/jquery-ui.min.js http://ajax.aspnetcdn.com/ajax/mvc/3.0/jquery.validate.unobtrusive.min.js http://ajax.aspnetcdn.com/ajax/jquery.validate/1.7/jquery.validate.min.js For each one, how can I revert to using local copy in the instance where it may be blocked/unavailable? Dmitry Evseev To