.button_show_room{
	background: url('/img/button_show_room.jpg') no-repeat top left; }
.button_show_room:hover{
	background: url('/img/button_show_room.jpg') no-repeat bottom left; }

.button_answer{
	background: url('/img/button_answer.jpg') no-repeat top left; }
.button_answer:hover{
	background: url('/img/button_answer.jpg') no-repeat bottom left; }

.button_calc{
	background: url('/img/button_calc.png') no-repeat top left; }
.button_calc:hover{
	background: url('/img/button_calc.png') no-repeat bottom left; }

#send{
	background: url('/img/send.jpg') no-repeat top right; }
#send:hover{
	background: url('/img/send.jpg') no-repeat bottom right;}
#BoxAlertBtnOk{
	display: block; position: absolute; top: 20px; right: 40px; width: 100px; height: 32px; 
	background: url('/img/close.jpg') no-repeat top right; }
#BoxAlertBtnOk:hover{
	background: url('/img/close.jpg') no-repeat bottom right;}