how to put an image in a dropdown html

1<!--Doesn't work in internet explorer-->
2
3<select name="countries" id="countries" class="icon-menu">
4<option value="">Select a Country</option>
5<option value="US">USA</option>
6<option value="IN">India</option>
7</select>
8
9
10CSS
11
12select.icon-menu option {
13background-repeat:no-repeat;
14background-position:bottom left;
15padding-left:30px;
16}
17select#countries option[value="US"] {
18background-image:url(flags/usa.png);
19}
20select#countries option[value="IN"] {
21background-image:url(flags/india.png);
22}