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- 请高手指点下面的javascript是什么意思?
======================================================
<html>
<title>下拉菜单</title>
<head>
<script lanuage="JavaScript">
function changemenu(tablemenu,img)
{
if (event.button==1)
{
if (tablemenu.style.display=="none")
{
tablemenu.style.display="";
img.src="2.bmp";
}
else
{
tablemenu.style.display="none";
img.src="1.bmp";
}
}
}
function message()
{
alert('aaaaaaaaa');
}
function changecolor(fontindex)
{
fontindex.color="red";
}
function restorecolor(fontindex)
{
fontindex.color="blue";
}
</script>
</head>
<body>
<form>
<h3>这是一个树型菜单的例子:</h3>
<hr>
<table id="table1" cellSpacing="0" cellPadding="0" width="200" border="0">
<tr valign=top>
<td width=10>
<img id=img1 onmouseup="javascript:changemenu(menu1,img1);" src=.\1.bmp align=bottom></img>
</td>
<td style="cursor:hand" valign=top align=left>
<font id=font1 onmousemove="javascript:changecolor(font1)" onmouseout="restorecolor(font1)" color=blue><label id=label1 onmouseup="javascript:changemenu(menu1,img1);"> 著名网站</label><font>
</td>
<tr>
<tr>
<td></td>
<td>
<table id="menu1" cellSpacing="0" cellPadding="0" width=100% border=0 style="display=none;">
<tr id=tr1 width=80 language="javascript" border=1 style="cursor:hand">
<td width=25><img src=3.bmp></td>
<td><a href="http:\\www.sina.com.cn" target=_blank>新浪</a></td>
</tr>
<tr border=1 style="cursor:hand">
<td><img src=3.bmp></td>
<td><a href="http:\\www.yahoo.com.cn" target=_blank>雅虎</a></td>
</tr>
<tr border=1 style="cursor:hand">
<td><img src=3.bmp></td>
<td><a href="http:\\www.263.net" target=_blank>263</a></td>
</tr>
<tr border=1 style="cursor:hand">
<td><img src=4.bmp></td>
<td><a href="http:\\www.sohu.com.cn" target=_blank>搜狐</a></td>
</tr>
</table>
</td>
</tr>
<tr>
<td width=10>
<img id=img2 src=.\1.bmp onmouseup="javascript:changemenu(menu2,img2);" align=bottom></img>
</td>
<td style="cursor:hand" valign=top align=left>
<font id=font2 onmouseup="javascript:changemenu(menu2,img2);" onmousemove="javascript:changecolor(font2)" onmouseout="restorecolor(font2)" color=blue> bbbbb<font>
</td>
<tr>
<tr>
<td></td>
<td>
<table id="menu2" cellSpacing="0" cellPadding="0" width=100% "border=0" style="display=none;color=blue">
<tr id=tr1 width=80 language="javascript" border=1 style="cursor:hand">
<td width=25><img src=3.bmp></td>
<td>5</td>
</tr>
<tr border=1 style="cursor:hand">
<td><img src=3.bmp></td>
<td>6</td>
</tr>
<tr border=1 style="cursor:hand">
<td><img src=3.bmp></td>
<td>7</td>
</tr>
<tr border=1 style="cursor:hand">
<td><img src=4.bmp></td>
<td>8</td>
</tr>
</table>
</td>
</tr>
</table>
</form>
</body>
</html>
http://expert.csdn.net/Expert/topic/2680/2680197.xml?temp=.6053278
http://expert.csdn.net/Expert/topic/2680/2680203.xml?temp=.7946588