Glossary Item Box

Squirrelcart v6.1.0

UnitPNG

Overview

There are 2 file formats used frequently on the web that support transparency - GIF and PNG. Transparency via PNG files is superior in that it supports alpha transparency, allowing the edges of a transparent area to blend in with whatever background color is behind the image. This also allows you to create areas that are semi-transparent (translucent?), allowing some of the background color to show through.

Most browsers have supported PNG alpha transparency for many years, with the exception of Internet Explorer which did not display PNG files with alpha transparency properly until version 7.0. As of this writing, IE 6.0 is fading fast and hopefully will no longer be used in the near future.

Because IE 6.0 is still used by a significant number of users, Squirrelcart has integrated a PNG alpha transparency script called UnitPNG. This script is only run for Internet Explorer 6.0 and fixes PNG support so alpha transparency functions as it does in other browsers.

UnitPNG is enabled by default in Squirrelcart, and can be turned off if you wish.

Enabling and Disabling UnitPNG

  1. Open your Store Settings page
  2. Locate the UnitPNG checkbox field in the 3rd Party Script Support fieldset:
  3. To enable, check the field. To disable, uncheck it.
  4. Click Save Changes 

 

 


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