css问题个人备忘录

个人问题答案记录文档，写在这里，一是写给健忘的自己，二是可以分享给需要的朋友。

1.背景图片和css3渐变可以同时使用吗？Is it possible to combine a background image and CSS3 gradients?

background: #6cab26;
background-image: url(IMAGE_URL); /* fallback */
background-image: url(IMAGE_URL), -webkit-gradient(linear, left top, left bottom, from(#6cab26), to(#6ceb86)); /* Saf4+, Chrome */
background-image: url(IMAGE_URL), -webkit-linear-gradient(top, #6cab26, #6ceb86); /* Chrome 10+, Saf5.1+ */
background-image: url(IMAGE_URL),    -moz-linear-gradient(top, #6cab26, #6ceb86); /* FF3.6+ */
background-image: url(IMAGE_URL),     -ms-linear-gradient(top, #6cab26, #6ceb86); /* IE10 */
background-image: url(IMAGE_URL),      -o-linear-gradient(top, #6cab26, #6ceb86); /* Opera 11.10+ */
background-image: url(IMAGE_URL),         linear-gradient(to bottom, #6cab26, #6ceb86); /* W3C */