var frm = {
	'loading_img': null,
	'process': function(form_id) {
		var form = $(form_id);

		new Ajax.Request(form.action, {
			method: form.method,
			parameters: form.serialize(true),
			onCreate: function () {
				if (frm.loading_img!=null) {
					$(frm.loading_img).show();
				} else {}
			
				form.disable();
			},
			onSuccess: function(transport) {
				if (frm.loading_img!=null) {
					$(frm.loading_img).hide();
				}
				
				form.enable();
				transport.responseText.evalScripts();
			}
		});
	}
}