Hello, I need your help to correct this code, because it's not working with 9.7
thx.

addButton1:before

{

content:' ';

background-image: url('https://asprunner.com/forums/file.php?topicimage=1&fieldname=question&id=24557&image=1&table=forumtopics';);

display: inline-block;

width: 16px;

height:16px;

margin-right: 7px;

vertical-align: -20%;

}