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1. No Z-index

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2. Z-index:1 on span "Size"

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3. Z-index:2 on span "Size"

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This is source ordered layout with floats. Please view the test in Safari 3 or Firefox 3.5 beta.

some text some text some text some text some text some text some text some text some text some text some text

some text some text some text some text some text some text some text some text some text some text some text

Text

z-index:1

Shadow

CSS3 22. The box-shadow property

CSS2.1 E.2 Painting order

CSS3 basic box model 14. Stacking contexts