[css] Insert image after each list item

What would be the best way to insert a small image after each list element? I tried it with a pseudo class but something is not right...

ul li a:after {
  display: block;
  width: 3px;
  height: 5px;
  background: url ('../images/small_triangle.png') transparent no-repeat;
}

Thanks for any help!

For IE8 support, the "content" property cannot be empty.

To get around this I've done the following :

.ul li:after {
    content:"icon";
    text-indent:-999em;
    display:block;
    width:32px;
    height:32px;
    background:url(../img/icons/spritesheet.png) 0 -620px no-repeat;
    margin:5% 0 0 45%;
}

Note : This works with image sprites too

Try this:

ul li a:after {
    display: block;
    content: "";
    width: 3px;
    height: 5px;
    background: transparent url('../images/small_triangle.png') no-repeat;
}

You need the content: ""; declaration to give your generated element content, even if that content is "nothing".

Also, I fixed the syntax/ordering of your background declaration.

I think your problem is that the :after psuedo-element requires the content: property set inside it. You need to tell it to insert something. You could even just have it insert the image directly:

ul li:after {
    content: url('../images/small_triangle.png');
}

ul li + li:before
{
    content:url(imgs/separator.gif);
}

My solution to do this:

li span.show::after{
  content: url("/sites/default/files/new5.gif");
  padding-left: 5px;
}