AlertJS is mainly two files that work together to make a cute home-made alerts system. With alertjs, The alerts work in every browser and look the same in every browser. This means, You don't get the alert hanging from the top allowing you to interact with other things like in chrome, and you don't get an alert in the middle fading the entire body and disallowing scroll or interaction like in firefox, And you don't get an ugly, scary, DOS error in internet explorer. You just get a cool, glowing alert created with plain javascript which is the same in every browser.