html - Hide image in responsiveness -

i working on sites responsive issue http://technoalliance.ae/ here http://www.responsinator.com/?url=http%3a%2f%2ftechnoalliance.ae%2f

@media (max-width: 767px){ .span12 .row-dynamic-el:nth-of-type(2) .media_el .animation_right.start_animation:first-of-type{display:none;}} 

but hiding 2 images 1 umbrella , 1 image map . need hide 1 umbrella on responsivenes. hiding 2 images in given above css . there other way in css3 solve issue? please thanks

in wordpress, don't exactly, in css take 2 tags images