<html><head><title></title><link rel="stylesheet" href="demo.css" type="text/css"></head><body><p>这段空间的高度会自动计算</p><div id="lockedDiv"><table width="100%" border="0" cellspacing="0"> <tr> <th>a</th> <th>b</th> <th>c</th> <th>d</th> <th>e</th> <th>f</th> <th>g</th> </tr> <tr><td>1</td><td>2</td><td>3</td><td>4</td><td>5</td><td>6</td><td>7</td></tr> <tr><td>1</td><td>2</td><td>3</td><td>4</td><td>5</td><td>6</td><td>7</td></tr> <tr><td>1</td><td>2</td><td>3</td><td>4</t