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<sc ript type="text/javascript">
   BX.message(<?=CUtil::PhpToJSObject($messages)?>);
   BX.Sale.OrderAjaxComponent.init({
      result: <?=CUtil::PhpToJSObject($arResult['JS_DATA'])?>,
      locations: <?=CUtil::PhpToJSObject($arResult['LOCATIONS'])?>,
      params: <?=CUtil::PhpToJSObject($arParams)?>,
      signedParamsString: '<?=CUtil::JSEscape($signedParams)?>',
      siteID: '<?=CUtil::JSEscape($component->getSiteId())?>',
      ajaxUrl: '<?=CUtil::JSEscape($component->getPath().'/ajax.php')?>',
      templateFolder: '<?=CUtil::JSEscape($templateFolder)?>',
      propertyValidation: true,
      showWarnings: true,
      pickUpMap: {
         defaultMapPosition: {
            lat: 55.76,
            lon: 37.64,
            zoom: 7
         },
         secureGeoLocation: false,
         geoLocationMaxTime: 5000,
         minToShowNearestBlock: 3,
         nearestPickUpsToShow: 3
      },
      propertyMap: {
         defaultMapPosition: {
            lat: 55.76,
            lon: 37.64,
            zoom: 7
         }
      },
      orderBlockId: 'bx-soa-order',
      authBlockId: 'bx-soa-auth',
      basketBlockId: 'bx-soa-basket',
      regionBlockId: 'bx-soa-region',
      paySystemBlockId: 'bx-soa-paysystem',
      deliveryBlockId: 'bx-soa-delivery',
      pickUpBlockId: 'bx-soa-pickup',
      propsBlockId: 'bx-soa-properties',
      totalBlockId: 'bx-soa-total',
      yourValue: '<?=$val?>' //Ваша переменная
   });
</sc ript>

this.yourValue = parameters.yourValue