How to add images to menuitem in button.

Lets assume that we have button with menupopup:

<button type="menu" label="Main">
  <menupopup>
    <menuitem id="miHomeId" label="Home Page"/>
    <menuitem id="miAboutId" label="About"/>
    <menuitem id="miContactId" label="Contact"/>
  </menupopup>
</button>

It will look something like this:



And we need to add different icons to each menuitem. The first idea is to use list-style-image attribute.

#miHomeId {
  list-style-image: url("chrome://toolbar/skin/Home.PNG");
}

It is really strange, but it doesn't work. I've tried to find some examples where this problem is solved. But I have found nothing. So, I've found one interesting workaround:

<button type="menu" label="Main">
  <menupopup>
    <menuitem id="miHomeId">
      <img src="chrome://toolbar/skin/Home.PNG" id="imgHomeId"/>
      <label value="Home Page"/>
    </menuitem>
    <menuitem id="miAboutId">
      <img src="chrome://toolbar/skin/About.PNG" id="imgAboutId"/>
      <label value="About"/>
    </menuitem>
    <menuitem id="miContactId">
      <img src="chrome://toolbar/skin/Contact.PNG" id="imgContactId"/>
      <label value="Contact"/>
    </menuitem>
  </menupopup>
</button>

And you just need to specify your images in CSS:

#imgHomeId {
  list-style-image: url("chrome://toolbar/skin/Home.PNG");
}
#imgAboutId {
  list-style-image: url("chrome://toolbar/skin/About.PNG");
}  
#imgContactId {
  list-style-image: url("chrome://toolbar/skin/Contact.PNG");
}

Here is the result: