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- <!DOCTYPE html>
- <body style="margin: 0; padding: 0;">
- <div style="position: absolute; overflow: hidden;
- left: 0; top: 0; width: 250px; height: 250px;
- background: green"
- id="greenbox">
- <div style="position: relative; left: 75px; top: 75px;
- width: 75px; height: 75px;
- background: green"
- id="redbox">
- </div>
- <script>
- var redbox = document.getElementById('redbox');
- redbox.onmouseover = function() { redbox.style.background = 'red'; };
- redbox.onmouseout = function() { redbox.style.background = 'green'; };
- </script>
- </div>
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