Passing Url Parameters from Magento Controller to Block view.If you

gistfile1.txt

class Binarygeometry_Tallgallery_AjaxController extends Mage_Core_Controller_Front_Action
{
   public function indexAction ()
   {
   		//URL EXAMPLE  tallgallery/ajax/index?prodid=187&&imagid=551
   		$productId = $this->getRequest()->getParam('prodid');  // get product id from url
   		$imageId   = $this->getRequest()->getParam('imagid'); 	// get image id from url
   		$imageSize = $this->getRequest()->getParam('resize');

		Mage::helper('catalog/product')->initProduct($productId, $this);  // make available to layout

    	$this->loadLayout(); // load the layout

    	$block = Mage::app()->getLayout()->getBlock('root');

		if ($block){   //check if block actually exists

		   $block->setImageId($imageId); // pass parament to view
		   $block->setImageResize($imageSize);
		   $block->setData('field',$imageSize);
		}

    	$this->renderLayout(); // render view
   }
}class Binarygeometry_Tallgallery_AjaxController extends Mage_Core_Controller_Front_Action
{
   public function indexAction ()
   {
   		//URL EXAMPLE  tallgallery/ajax/index?prodid=187&&imagid=551
   		$productId = $this->getRequest()->getParam('prodid');  // get product id from url
   		$imageId   = $this->getRequest()->getParam('imagid'); 	// get image id from url
   		$imageSize = $this->getRequest()->getParam('resize');

		Mage::helper('catalog/product')->initProduct($productId, $this);  // make available to layout

    	$this->loadLayout(); // load the layout

    	$block = Mage::app()->getLayout()->getBlock('root');

		if ($block){   //check if block actually exists

		   $block->setImageId($imageId); // pass parament to view
		   $block->setImageResize($imageSize);
		   $block->setData('field',$imageSize);
		}

    	$this->renderLayout(); // render view
   }
}

block phtml

<?php
$product = $this->getProduct(); // cache the product
$imageId = $this->getImageId(); 
$imageSize = $this->getData('field');
$imageGallery = $this->getGalleryImages();