function show(id,a_id){
    var obj = document.getElementById(id);
	var obj_a = document.getElementById(a_id);
	    obj.style.height = "auto";
		if((obj.style.display=="") || (obj.style.display == "none")){
			obj.style.display = "block";
				obj_a.className = "block_active";
				    }else{
					    obj.style.display = "none";
						    obj_a.className = "block";
							}
							    
							    }