如题 我发现打开网页后 下拉菜单就出现了 只有在鼠标放上去并移开后下拉菜单才会消失
怎样改代码 使得一打开网页就看不到隐藏的下拉菜单呢？？ 先谢谢各位了<html>
<head>
<title>
用层做的下拉菜单
</title>
<style>
div.a
{
position:absolute;
top:20;
left:20;
width:100;
background-color:yellow;
}
div.b
{
position:absolute;
top:20;
left:120;
width:100;
background-color:blue;
}
div.c
{
position:absolute;
top:20;
left:220;
width:100;
background-color:green;
}
</style>
</head>
<body>
<div class=a>
<table border=1 width=100 cellspacing=0 cellpadding=0>
<tr>
<td onmouseover="app()" onmouseout="hid()" >
a<div id=menu>
<table border=1 width=100 cellspacing=0 cellpadding=0>
<tr>
<td bgcolor=green>
a1
</td>
</tr>
<tr>
<td>
a2
</td>
</tr>
<tr>
<td>
a3
</td>
</tr>
</table>
</div>
</td>
</tr>
</table>
</div>
</div>
<div class=b>
<table border=1 width=100 cellspacing=0 cellpadding=0>
<tr>
<td>
b
</td>
</tr>
</table>
</div>
<div class=c>
<table border=1 width=100 cellspacing=0 cellpadding=0>
<tr>
<td>
c
</td>
</tr>
</table>
</div>
<script>
function app(){menu.style.display="block"}
function hid(){menu.style.display="none"}
</script>
</body>
</html>
怎样改代码 使得一打开网页就看不到隐藏的下拉菜单呢？？ 先谢谢各位了<html>
<head>
<title>
用层做的下拉菜单
</title>
<style>
div.a
{
position:absolute;
top:20;
left:20;
width:100;
background-color:yellow;
}
div.b
{
position:absolute;
top:20;
left:120;
width:100;
background-color:blue;
}
div.c
{
position:absolute;
top:20;
left:220;
width:100;
background-color:green;
}
</style>
</head>
<body>
<div class=a>
<table border=1 width=100 cellspacing=0 cellpadding=0>
<tr>
<td onmouseover="app()" onmouseout="hid()" >
a<div id=menu>
<table border=1 width=100 cellspacing=0 cellpadding=0>
<tr>
<td bgcolor=green>
a1
</td>
</tr>
<tr>
<td>
a2
</td>
</tr>
<tr>
<td>
a3
</td>
</tr>
</table>
</div>
</td>
</tr>
</table>
</div>
</div>
<div class=b>
<table border=1 width=100 cellspacing=0 cellpadding=0>
<tr>
<td>
b
</td>
</tr>
</table>
</div>
<div class=c>
<table border=1 width=100 cellspacing=0 cellpadding=0>
<tr>
<td>
c
</td>
</tr>
</table>
</div>
<script>
function app(){menu.style.display="block"}
function hid(){menu.style.display="none"}
</script>
</body>
</html>
<html>
<head>
<title>
用层做的下拉菜单
</title>
<style>
div.a
{
position:absolute;
top:20;
left:20;
width:100;
background-color:yellow;
}
div.b
{
position:absolute;
top:20;
left:120;
width:100;
background-color:blue;
}
div.c
{
position:absolute;
top:20;
left:220;
width:100;
background-color:green;
}
</style>
</head>
<body>
<div class=a>
<table border=1 width=100 cellspacing=0 cellpadding=0>
<tr>
<td onmouseover="app()" onmouseout="hid()" >
a<div id=menu style="display:none">
<table border=1 width=100 cellspacing=0 cellpadding=0>
<tr>
<td bgcolor=green>
a1
</td>
</tr>
<tr>
<td>
a2
</td>
</tr>
<tr>
<td>
a3
</td>
</tr>
</table>
</div>
</td>
</tr>
</table>
</div>
</div>
<div class=b>
<table border=1 width=100 cellspacing=0 cellpadding=0>
<tr>
<td>
b
</td>
</tr>
</table>
</div>
<div class=c>
<table border=1 width=100 cellspacing=0 cellpadding=0>
<tr>
<td>
c
</td>
</tr>
</table>
</div>
<script>
function app(){menu.style.display="block"}
function hid(){menu.style.display="none"}
</script>
</body>
</html>
hid();
};