js 多物体运动
<!doctype html>
<html>
<head>
<meta charset = "utf-8">
<title>未命题</title>
<style>
*{margin: 0;
padding: 0;
}
#div1{
height: 200px;
width: 150px;
background: red;
position:absolute;
top:50px;
left: -150px;
}
#div2{
height: 50px;
width: 20px;
background: black;
color: white;
position:absolute;
top:100px;
right:-20px;
line-height: 25px;
cursor: pointer;
}
img{
margin-left: 200px;
opacity: 0.3;
alpha(opacity = 30);
}
</style>
<script>
window.onload = function ()
{
odiv1 = document.getElementById('div1');
odiv2 = document.getElementById('div2');
oimg = document.getElementById('img1');
odiv1.onmouseover= function ()
{
startMove(this,'left',0,10);
}
odiv1.onmouseout = function ()
{
startMove(this,'left',-150,-10);
}
oimg.onmouseover = function ()
{
startMove(this,'opacity',100,10);
}
oimg.onmouseout = function ()
{
startMove(this,'opacity',30,-10);
}
function startMove (obj,attr,goal,speed)
{
clearInterval(obj.timer);
var icur = 0;
obj.timer = setInterval(function(){
if(attr == 'opacity')
{
icur = Math.round(css(obj,'opacity')*100);
}
else
{
icur = parseInt(css(obj,attr))
}
if(icur == goal)
{
clearInterval(obj.timer);
}
else
{
if(attr == 'opacity')
{
obj.style.opacity = (icur + speed )/100;
obj.style.filter = 'alpha(opacity = '+ (icur + speed ) +')';
}
else
{
obj.style[attr] = icur + speed + 'px';
}
}
},30);
}
function css(obj,attr)
{
if(obj.currentStyle)
return obj.currentStyle[attr];
else
return getComputedStyle(obj,false)[attr];
}
}
</script>
</head>
<body>
<div id="div1"><div id="div2">分享</div></div>
<img id="img1" src = "img/1.jpg">
</body>
</html>
