$(document).ready(function(){

	$('#but1').click(function(){
		$.ajax({
			url: "low_menu_r.php",
			cache: false,
			success: function(html){
				$("#part1").html(html);
			}
		});
	document.getElementById("but1").style.display='none';
	document.getElementById("but2").style.display='block';
	});
	

	$('#but2').click(function(){
		$.ajax({
			url: "low_menu_r1.php",
			cache: false,
			success: function(html){
				$("#part1").html(html);
			}
		});
	document.getElementById("but2").style.display='none';
	document.getElementById("but1").style.display='block';
	});

	
	
});