Based on a sample of 5,094,735 web sites, the following table illustrates the penetration rate of a variety of client side technologies:

Technology	Sites	Percentage
JavaScript	1,981,601	38.90%
Frames	43,798	0.86%
StyleSheets	1,785,932	35.05%
Java	2,078	0.04%
IFrames	384,525	7.55%
GIF Images	1,213,615	23.82%
JPG Images	1,595,439	31.32%
PNG Images	1,631,006	32.01%
Flash/Shockwave	42,345	0.83%