通过CSS3的linear-gradient实现的
<div class="bg"></div>
.bg{
width:300px;
height:50px;
background:#caca8c;
background-image:-webkit-gradient(linear,50% 0,0 100%,
from(transparent),
color-stop(.5,transparent),
color-stop(.5,#d86707),
to(#d86707)
),
-webkit-gradient(linear,50% 0,100% 100%,
from(transparent),
color-stop(.5,transparent),
color-stop(.5,#d86707),
to(#d86707)
);
background-image:-moz-linear-gradient(50% 0 -45deg,
transparent,
transparent 50%,
#d86707 50%,
#d86707
),-moz-linear-gradient(50% 0 -135deg,
transparent,
transparent 50%,
#d86707 50%,
#d86707
);
background-size:30px 15px;
background-repeat:repeat-x;
background-position:0 100%;
}