slideToggle(show and hide img) problem

slideToggle(show and hide img) problem

I am looking for a way to switch between 2 images in a accordion.

JS:
$(".toggle").click(function(){
   var id = $(this).attr('id');
      $("#toggl"+ id).slideToggle("slow");
         if ($('.close').is(":hidden")){
             $(".close").show();
             $(".open").hide();
          } else {
             $(".open").show();
             $(".close").hide();
          }
});


HTML:
            <div class="box-780-head">
                <h3>Box 1</h3>
                <a href="#" class="toggle" id="e1">
                    <img src="toggle-plus.jpg" class="close" alt=""/>
                    <img src="toggle-min.jpg" class="open" style="display:none;" alt=""/>
                </a>
                <img src="delete.jpg" class="delete" alt=""/>
            </div>
            <div class="box-780-body" id="toggle1">toggle content</div>


As you can see this will switch all of the button on a page.
Hope some one knows to help me with this?

I dont want to give the images an #id!


greetz