function toggleAvail(chkbox, name){
	element1 = document.getElementById(name+"1");
	element2 = document.getElementById(name+"2");
	if(chkbox.checked){
		element1.style.display = 'block';
		element2.style.display = 'none';
	}else{	
		element1.style.display = 'none';
		element2.style.display = 'block';
	}
}