I am trying to use a javascript zoom script on my small images.

Basically I just need to know what function brings out the path to larger image.

I'm working on includes/modules/custom/new_products.php

I'm just editing the tag that every "new product" comes with.

PHP Code:
  'style="position:relative" onmouseover="showtrail(\' PATH HERE (images/medium/blank_MED.png' . '\',\'' . $new_products->fields['products_name'] . '\',250,130,350,373,this,0,0,250,130);" onmouseout="hidetrail();"') . '</a><br />')