$(function(){
$("select#select_categ").change(function(){
var id_categ = $('#select_categ').val();
	$.post("recherche-select.php", 
		{ idmar:id_categ },
		function(data){
			//alert(id_categ);
			//alert(data);
			$("#select_marque").html(data);
		});
	$.post("recherche-select.php", 
		{ idcarros:id_categ },
		function(data){
			//alert(id_categ);
			//alert(data);
			$("#select_carrosserie").html(data);
		});
	});
$("select#select_marque").change(function(){
var id_mod = $('#select_marque').val();
	$.post("recherche-select.php", 
		{ idmod:id_mod },
		function(data){
			//alert(id_mod);
			//alert(data);
			$("#select_modele").html(data);
		});
	});
});