function switchInfoBT(obj) {

	var id = obj.parentNode.parentNode.parentNode.id;
	var showBT = document.getElementById(id+"BTShow");
	var hideBT = document.getElementById(id+"BTHide");
	
	if(obj.parentNode.id == id+"BTShow"){
		showBT.setAttribute("style","visibility:hidden");
		hideBT.setAttribute("style","visibility:visible");
	} else {
		showBT.setAttribute("style","visibility:visible");
		hideBT.setAttribute("style","visibility:hidden");
	}
}