AddEventHandler iblock OnIBlockPropertyBuil dList array CIBlockElement

<?
AddEventHandler('iblock', 'OnIBlockPropertyBuildList', array('CIBlockElementListExtended', 'GetUserTypeDescription'), 5000);

require dirname(__FILE__)."/lang/".LANGUAGE_ID."/property_type.php";

class CIBlockElementListExtended
{
    function GetUserTypeDescription()
    {
        return array(
            "PROPERTY_TYPE" => "E",
            "USER_TYPE"	=> "ElementExtended",
            "DESCRIPTION"=> GetMessage("PROP_TYPE_ELEMENT_LIST_EXTENDED_DESCRIPTION"),
            "GetPropertyFieldHtml" => array("CIBlockElementListExtended","GetPropertyFieldHtml"),
        );
    }

    function GetPropertyFieldHtml($arProperty, $value, $strHTMLControlName)
    {
        $strResult = "";
        if(intval($value["VALUE"]) > 0)
        {
            $arFilter = Array(
                "ID" => intval($value["VALUE"]),
                "IBLOCK_ID" => $arProperty["LINK_IBLOCK_ID"],
            );
            $rsItem = CIBlockElement::GetList(Array(), $arFilter, false, false, Array("ID", "IBLOCK_ID", "NAME"));
            $arItem = $rsItem->GetNext();
        }
        $strResult .=
            '<input name="'.$strHTMLControlName["VALUE"].'" id="'.$strHTMLControlName["VALUE"].'" value="'.htmlspecialcharsex($value["VALUE"]).'" size="5" type="text">'.
            '<input type="button" value="..." onClick="jsUtils.OpenWindow(\'/bitrix/admin/iblock_element_search.php?lang='.LANG.'&amp;IBLOCK_ID='.$arProperty["LINK_IBLOCK_ID"].'&amp;n='.$strHTMLControlName["VALUE"].'\', 600, 500);">'.
            '&nbsp;<input type="text" name="'.$strHTMLControlName["DESCRIPTION"].'" value="'.htmlspecialcharsex($value["DESCRIPTION"]).'" />'.
            '&nbsp;<span id="'.md5($strHTMLControlName["VALUE"]).'" >'.$arItem["NAME"].'</span>';

        return  $strResult;
    }
}