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<html><head><style>div.ex1 { width: 500px; margin: auto; border: 3px solid #73AD21;}div.ex2 { max-width: 500px; margin: auto; border: 3px solid #73AD21;}</style></head><body><h2>CSS Max-width</h2><div class="ex1">This div element has width: 500px;</div><br><div class="ex2">This div element has max-width: 500px;</div><p><strong>Tip:</strong> Drag the browser window to smaller than 500px wide, to see the difference between the two divs!</p></body></html>