In general, it is done using the mouse hover onmouseover and mouse removal onmouseout.
First is the HTML structure
The code copy is as follows:
<body>
<div id="div1">
<span>Sidebar</span>
</div>
</body>
Then there is the style of css:
The code copy is as follows:
#div1{
width:150px;
height:200px;
background:#999999;
pose: absolute;
left:-150px;}
span{
width:20px;
height:70px;
line-height:23px;
background:#09C;
pose: absolute;
right:-20px;
top:70px;}
The default style sidebar is hidden as shown in the figure:
When the mouse is moved in, as shown in the figure:
Here is the complete code:
The code copy is as follows:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Unt titled document</title>
<Style Type = "Text/CSS">
#div1{
width:150px;
height:200px;
background:#999999;
pose: absolute;
left:-150px;}
span{
width:20px;
height:70px;
line-height:23px;
background:#09C;
pose: absolute;
right:-20px;
top:70px;}
</style>
<script>
window.onload=function(){
var odiv=document.getElementById('div1');
odiv.onmouseover=function ()
{{
startmove(0,10);//The first parameter is the target value of the div left attribute. The second is how many pixels are moved each time.
}
odiv.onmouseout=function ()
{{
startmove(-150,-10);
}
}
var timer=null;
function startmove(target,speed)
{{
var odiv=document.getElementById('div1');
clearInterval(timer);
timer=setInterval(function (){
if(odiv.offsetLeft==target)
{{
clearInterval(timer);
}
else
{{
odiv.style.left=odiv.offsetLeft+speed+'px';
}
},30)
}
</script>
</head>
<body>
<div id="div1">
<span>Sidebar</span>
</div>
</body>
</html>