Linear-gradient not working in chrome, linear-gradient không hoạt động trên Firefox

Của bạn đây nhé:

HTML:

background: -webkit-gradient(linear, top left, top right, color-stop(0%, #1e69b2), color-stop(50%,#288ad6), color-stop(100%,#1e69b2)); /* Chrome, Safari4+ */
background: -webkit-linear-gradient(top, #1e69b2 0%,#288ad6 50%,#1e69b2 100%); /* Chrome10+, Safari5.1+ */
background: -moz-linear-gradient(top, #1e69b2 0%,#288ad6 50%,#1e69b2 100%); /* FF3.6+ */
background: linear-gradient(to top, #1e69b2 0%,#288ad6 50%,#1e69b2 100%); /* W3C */