<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<font face="Verdana, Geneva, sans-serif"></font>
<style type="text/css">
#div1{width:100px;height:100px;background:#ccc;position:absolute;top:0px;left:0px;}
#div2{width:100px;height:100px;background:#ccc;position:absolute;left:0px;top:110px;}
#div3{width:100px;height:100px;background:red;position:absolute;left:220px;top:0px;filter:alpha(opacity:30);opacity:0.3;}
#div4{width:100px;height:100px;background:red;position:absolute;left:330px;top:0px;filter:alpha(opacity:30);opacity:0.3;}
#div5{width:100px;height:100px;background:red;position:absolute;left:440px;top:0px;filter:alpha(opacity:30);opacity:0.3;}
</style>
<script type="text/javascript">
window.onload=function()
{
oDiv1=document.getElementById("div1");
oDiv2=document.getElementById("div2");
oDiv3=document.getElementById("div3");
oDiv4=document.getElementById("div4");
oDiv5=document.getElementById("div5");
oDiv1.onmouseover=function(){
Move(oDiv1,"width",200);
//alert(getStyle(oDiv1,"width"));
}
oDiv1.onmouseout=function(){
Move(oDiv1,"width",100);
}
oDiv2.onmouseover=function(){
Move(oDiv2,"height",200);
}
oDiv2.onmouseout=function(){
Move(oDiv2,"height",100);
}
oDiv3.onmouseover=function(){
Move(oDiv3,"opacity",100);
}
oDiv3.onmouseout=function(){
Move(oDiv3,"opacity",30);
}
oDiv4.onmouseover=function(){
Move(oDiv4,"opacity",100);
}
oDiv4.onmouseout=function(){
Move(oDiv4,"opacity",30);
}
oDiv5.onmouseover=function(){
Move(oDiv5,"opacity",100);
}
oDiv5.onmouseout=function(){
Move(oDiv5,"opacity",30);
}
}
//获取行间样式
function getStyle(obj,attr) //getStyle 非行间属性 结果值为 ***px
{ if(obj.currentStyle)
{
return obj.currentStyle[attr];
}
else{
return getComputedStyle(obj,false)[attr];
}
}
//多物体不同运动框架
function Move(obj,attr,itarget)
{
clearInterval(obj.timer);
obj.timer=setInterval(function(){
if(attr=="opacity")
{ cur=parseFloat(getStyle(obj,attr))*100;
speed=(itarget-cur)/10;
speed=speed>0?Math.ceil(speed):Math.floor(speed);
if(cur==itarget)
{
clearInterval(obj.timer);
}else
{ cur+=speed;
obj.style.opacity=cur/100;
obj.style.filter="alpha(opacity:"+cur+")";
}
}
else
{
cur=parseInt(getStyle(obj,attr));
speed=(itarget-cur)/10; //parseInt 获取的值转化为数
speed=speed>0?Math.ceil(speed):Math.floor(speed); //向下、向上取正
if(cur==itarget)
{
clearInterval(obj.timer);
}else
{
obj.style[attr]=cur+speed+"px";
}
}
},30)
}
</script>
</head>
<body>
<div id="div1">变宽</div>
<div id="div2">变高</div>
<div id="div3"></div>
<div id="div4"></div>
<div id="div5"></div>
</body>
</html>