function showHide(block, servs, cspan){
	
	if ($('#'+servs).css('display')=='none') {
		$('.cat').css('background-image','url("style/image/strelka_right.gif")');
		$('#'+cspan).css('background-image','url("style/image/strelka_down.gif")');
		$('.servs').slideUp('middle');
		$('#'+servs).slideDown('middle');
	} else {
		$('#'+cspan).css('background-image','url("style/image/strelka_right.gif")');
		$('#'+servs).slideUp('middle');
	}
	
}