presubmit_checkserial = function(){
	var brand=$("r_brand"+this.uid).value;

	switch(brand){
		case 'hu':
			var serial=$("r_serials"+this.uid).value;
			break;
		case 'hk':
			var serial=$("r_serials"+this.uid).value;
			break;
	}

	var req = new ljex.Ajax({
		url: 'scripts/presubmit_checkserial.php5',
		method: 'POST',
		async: false,
		param: {
			brand: brand,
			serial: serial,
			id: $("r_id"+this.uid).value
		}
	});

	var response = req.request();
	var data = eval("("+response.responseText+")");

	if(data['success']){
		return true;
	}else{
		$warn(data.msg);
		return false;
	}

}