谢谢大家的回复。
我通过使用 Mark 给出的技术,使用 html 和 css 暂时解决了这个问题。但是,我认为使用 javascript 可以使事情变得更容易和更有条理。我对脚本的了解还不够好。我在下面为其他人发布了我的 html。
我仍然有一个问题,如何使用图像的 id 作为检索特定信息部分的参数。例如:我有一个 id=img1 的图像和一个包含子参数的 xml 文件。因此,当我将鼠标悬停在图像上时,js 会获取该图像的 id,然后将 xml 的特定部分加载到“info”div 而不是整个 xml。(回答亚当的问题,数据类型就是文本)
enter code here
<!DOCTYPE html>
<html>
<head>
<style>
div.maincontent{
border: none;
margin:0px;
padding:0px;
}
div.leftcol, div.rightcol {
/*
* Note that the left column and the right column use position fixed
* to make placement of the elements on top easier.
*/
position:fixed;
top:0px;
width:200px;
height: 100%;
background-color: green;
color: white;
}
div.leftcol{
left:0px;
}
div.rightcol{
right:0px;
}
div.middlecontent{
/*
* Note the left and right margin to place the div.
* With this margin you can
*/
margin:0px 200px 0px 200px;
position: absolute;
top:0px;
left:0px;
}
div.square{
float:left;
margin:0px;
width:200px;
height:200px;
border:10px solid black;
background-color: blue;
}
div.left_content, .right_content {
/*
*Initially do not display the div.left_content
*and div.right_content.
*I still set the all the styles here the divs have in common.
*/
margin:0px;
position:fixed;
margin:0px;
top:0px;
width:200px;
height: 100%;
background-color: blue;
color:white;
display: none; /* do not display */
}
div.square:hover > div.left_content {
/*
*When you hover over a square take from the children
*those with div.left_content and display them.
*The left one is displayed on top of the left div.leftcol
*/
left:0px;
display:block;
}
div.square:hover > div.right_content {
/*
*When you hover over a square take from the children
*those with div.right_content and display them.
*The right one is displayed on top of the right div.rightcol
*/
right:0px;
display:block;
}
</style>
</head>
<body>
<div class="maincontent">
<div class="leftcol">
<p>
Hover over the blue divs in the middle
</p>
<p>
This trick uses the > to find children of an element.
The children are only displayed when hovering over the parent element.
Look at the CSS how that is done. for instance for the left div it is
div.square:hover > div.left_content
</p>
<p> something inside the left column</p>
</div>
<div class="rightcol">
<p>something inside the right column</p>
</div>
<div class="middlecontent">
<div class="square">
<!--
this div has two children
a div with class="left_content" and
a div with class="right_content"
-->
<div class="left_content">
<p> first div </p>
<p> something as left content </p>
</div>
<div class="right_content">
<p> first div </p>
<p> something as right content </p>
</div>
</div>
<div class="square">
<div class="left_content">
<p> second div </p>
<p> something as left content </p>
</div>
<div class="right_content">
<p> second div </p>
<p> something as right content </p>
</div>
</div>
<div class="square">
<div class="left_content">
<p> third div </p>
<p> something as left content </p>
</div>
<div class="right_content">
<p> third div </p>
<p> something as right content </p>
</div>
</div>
</div>
</div>
</body>
</html>