层的显示隐藏及居中,急呀~~~~
isaxu 2003-03-25 02:44:57 两层目录,鼠标移动到一级目录,下面显示出其子目录(在此一级目录下面显示),鼠标移开,子目录消失,怎么办?源代码如下,这段代码只能实现显示子目录,但是子目录不能准确消失,而且子目录总是在页面的最左边,不能和其父目录对应。请大虾帮忙!!!
<?php
echo "<script LANGUAGE=JavaScript>\n ";
echo " function showIt(i) \n ";
echo " { \n";
echo " whichE1 = eval('a' + i ); \n";
echo " whichE1.style.visibility = 'visible'; \n ";
echo " for(j = 0;j<count1 && j!=i;j++) \n ";
echo " { \n ";
echo " whichE1 = eval('a' + j ); \n";
echo " whichE1.style.visibility = 'hidden'; \n ";
echo " } \n ";
echo " } \n ";
echo "</script>";
?>
<body>
<table width="90%" border="0">
<tr>
<?php for ($i=0;$i<$count1;$i++){ ?>
<td onMouseOver="showIt('<?php echo $i;?>')">
<table>
<tr>
<td>
<a href='select_result.php?typename=<?php echo $type1[$i]; ?>'><?php echo $type1[$i];?></a>
</td>
</tr>
<tr>
<td>
<div id="<?php echo 'a'.$i;?>" class="gen1" style="position:absolute; width:113px; height:82px; z-index:1; left: 3px; top: 33px; visibility: hidden;">
<table width="90%" border="0">
<?php for ($j=0;$j<$count2[$i];$j++){ ?>
<tr><td><a href='select_result.php?typename=<?php echo $type2[$i][$j]; ?>'><?php echo $type2[$i][$j];?></a></td></tr>
<?php } ?>
</table>
</div>
</td>
</tr>
</table>
</td>
<?php } ?>
</tr>
</table>
</body>