                     if $(target) is null
                         alert("Invalid target #{target} in build #{subbstr}")
                     
-                    #target = slide.modifyTargetIdForUniqueness(target)
+                    target = slide.modifyTargetIdForUniqueness(target)
                     
                     build_obj = build_types[type](@slide_div, target, args...)
 

                #$.get(path, success, error)
        
        
        $('g').each (i) ->
            op = $(this).css('opacity')
            console.log("opacity = #{op}")
            if $(this).css('opacity') == undefined
                $(this).css('opacity', 1.0)
    
    
    # -----------------------------------------------------------------------

    modifyTargetIdForUniqueness: (target) ->
        slide_id = @slide_div.attr('id')
        this_slide = @slide_div

        target_id = target.replace(/#/g,'')

        # t = $(target, this_slide)
        t = this_slide.find(target)
        console.log(t)
        
        new_target = target_id + '_' + slide_id
        new_target_sel = '#' + new_target
        
        if t == undefined or t == null or t.length == 0
            # try to route around bugs in JQuery selection into SVGs
            t = exhaustiveSearchByID($('svg', this_slide).get(0), target_id)
        
        if t == undefined or t == null or t.length == 0
            # if we still couldn't find an appropriate match, just pass back the original
            # target selector, unmodified
            console.log('Could not find element matching target: ' + target)
            return target
            
        console.log(t)
        console.log('modifying ' + target + ' to ' + new_target)

        t.attr('id', new_target)
        console.log('now: ' + t.attr('id') + ', ' + t)
        
        return new_target_sel

