handler.js

var j = jQuery.noConflict();
j(function(){
	j("#applyForm").submit(function(e){
		e.preventDefault();
		var form = j(this);
		var success = j("#applyFormSuccess");
		var submit = form.find("input:submit");
		var error = form.find(".error").hide();
		if(!submit.is(".busy")){
			submit.addClass("busy");
			j.post(form.attr("action"), form.serialize())
			.success(function(data, textStatus, xhr){
				form.hide();
				success.show();
			})
			.error(function(data, textStatus, xhr){
				try {
					error.text(j.parseJSON(data.responseText)).fadeIn("fast");
				}
				catch (e) {
					error.text("Ошибка " + data.status + " (" + data.statusText + ")").fadeIn("fast");
				}
			})
			.complete(function(data, textStatus, xhr){
				submit.removeClass('busy');
			});
		}
	});
});