Quirksmode Drag and Drop Script
From http://www.quirksmode.org/js/dragdrop.html
Works with position:fixed or absolute, but not relative. Keyboard accessible. Works in IE.
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position: relative;
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position: relative;
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position: relative;
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position: absolute;
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position: absolute;
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position: fixed;
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position: relative;
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position: relative;
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position: relative
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position: absolute
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position: absolute
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position: fixed