$('#filterForm').submit(function(){
$.ajax({
type: "POST",
url: "http://dada.ru/catalog/index/9",
dataType: "json",
data: {
'filtersCheck[]': filtersCheck.join()
},
success: function(html){
$("#catalog").innerHTML= '';
$("#catalog").html(html);
}
});
return false;
});
$('#filterForm').submit(function(q){
q.preventDefault();
/* your code ... */
});