[jQuery] Load image with an ajax preloader?

[123gotoandplay]

How do i make this work?

$("#color_update").change(function(){
                        var src = $("option:selected", this).val() ;
                        var src2 = $("#quantity_update option:selected").text();
                        $('#imagePreview').html('<p><div id="ajaxLoader" 
align="center"
><img src="ajax-loader.gif" width="32" height="32" /></div></p>');
                        $('#imagePreview').load('<img 
src="'+src+"-"+src2+'.jpg"/>');
                        alert(src+"-"+src2+".jpg");
        });