By Scott Isaacs

Internet Explorer 4.0 supports CSS extensions for adding custom effects to your HTML page. These effects are called filters.

Filters can replace many of the current uses of images. For example, the title to this section is plain HTML (try selecting the text) and not an image. The shadow effect was added using a dropShadow filter. In browsers that do not support Filters, the filter is ignored and the header is displayed normally.

Internet Explorer 4.0 currently supports the following visual filters:

Effect	Description
Alpha	Sets a transparency level.
Blur	Creates the impression of moving at high speed.
Chroma	Makes a specific color transparent.
DropShadow	Creates an offset solid silhouette.
FlipH	Creates a horizontal mirror image.
FlipV	Creates a vertical mirror image.
Glow	Adds radiance around the outside edges of the object.
Grayscale	Drops color information from the image.
Invert	Reverses the hue, saturation, and brightness values.
Light	Projects a light source onto an object.
Mask	Creates a transparent mask from an object.
Shadow	Creates a solid silhouette of the object.
Wave	Creates a sine wave distortion along the x-axis.
XRay	Shows just the edges of the object.

Next we will discuss creating filters with the CSS Filter Property.

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