效果图：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "<a href="http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd</a>">
<html xmlns="<a href="http://www.w3.org/1999/xhtml">http://www.w3.org/1999/xhtml</a>">
<head>
<title>CSS使背景颜色渐变--柯乐义</title>
<style type="text/css">
.jb_keleyi_com{
height: 300px;
width:100px;
margin:0px auto;
background-image: -moz-linear-gradient(top, #00FF00, #FF0000); /*火狐*/
background: -o-linear-gradient(top, #00FF00 0%,red 100%);/*Opera*/
background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0, #00FF00), color-stop(1,#FF0000)); /*Chrome*/
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#00FF00', endColorstr='#FF0000', GradientType='0'); /*IE*/
}
</style></p> <p></head>
<body>
用CSS是div颜色渐变
</p> <p><div>从绿到红
keleyi.com</div>
</body>
</html>