Mine

// SHITAS
	if (is_array($_FILES["f"]["name"])) {
		foreach($_FILES["f"]["name"] as $fileindex => $fileval) {
			$f["f"][$fileindex]["name"] = $_FILES["f"]["name"][$fileindex];
			$f["f"][$fileindex]["type"] = $_FILES["f"]["type"][$fileindex];
			$f["f"][$fileindex]["tmp_name"] = $_FILES["f"]["tmp_name"][$fileindex];
			$f["f"][$fileindex]["error"] = $_FILES["f"]["error"][$fileindex];
			$f["f"][$fileindex]["size"] = $_FILES["f"]["size"][$fileindex];
		}
	}
	if (CModule::IncludeModule("iblock")) {
		if($rsElementX = GetIBlockElementListEx("skelbimai", false, false, array(), false, array("ID"=>900, "ACTIVE_DATE"=>""))) {
	
			if($obElementX = $rsElementX->GetNextElement()) $arPropertyX = $obElementX->GetProperties();
			foreach($f["f"] as $fileindex => $fileval) {
					CIBlockElement::SetPropertyValueCode(900, "failai",
						 Array($arPropertyX["failai"]["PROPERTY_VALUE_ID"]=>$f["f"][$fileindex]));
			}
		}
	}


// NUO SHITO

if (is_array($_FILES["filesX"]["name"])):
	foreach($_FILES["filesX"]["name"] as $fileindex => $fileval):
		$FILES_X["filesX"][$fileindex]["name"] = $_FILES["filesX"]["name"][$fileindex];
		$FILES_X["filesX"][$fileindex]["type"] = $_FILES["filesX"]["type"][$fileindex];
		$FILES_X["filesX"][$fileindex]["tmp_name"] = $_FILES["filesX"]["tmp_name"][$fileindex];
		$FILES_X["filesX"][$fileindex]["error"] = $_FILES["filesX"]["error"][$fileindex];
		$FILES_X["filesX"][$fileindex]["size"] = $_FILES["filesX"]["size"][$fileindex];
	endforeach;
endif;


if (CModule::IncludeModule("iblock") && strlen("submit_adverts") > 0):

	if($rsElementX = GetIBlockElementListEx("skelbimai", false, false, array(), false, array("ID"=>900, "ACTIVE_DATE"=>""))) :

		if($obElementX = $rsElementX->GetNextElement()) $arPropertyX = $obElementX->GetProperties();

		foreach($FILES_X["filesX"] as $fileindex => $fileval) {
			CIBlockElement::SetPropertyValueCode(900, "failai",
				 Array($arProperty["failai"]["PROPERTY_VALUE_ID"]=>$FILES_X["filesX"][$fileindex]));
		}

	endif;

endif;