<!DOCTYPE?html>
<html>
<head>
<title></title>
<style?type="text/css">
*{
padding:?0;
margin:?0;
}
.a{
width:?100px;
height:?100px;
background:?aquamarine;
margin-bottom:?10px;
}
</style>
<script?type="text/javascript">
var?timer;
window.onload=function(){
var?div1=document.getElementById("div1");
var?div2=document.getElementById("div2");
div1.onmouseover=function(){
startMove(this,"height",300);
}
div1.onmouseout=function(){
startMove(this,"height",100);console.log("hello");
}
}
function?startMove(obj,attr,iTarget){
clearInterval(timer);
var?icur=parseInt(getStyle(obj,attr));
timer=setInterval(function(){
speed=(iTarget-icur)/5;
speed=speed>0?Math.ceil(speed):Math.floor(speed);
if(icur==iTarget){
clearInterval(timer);
}
else{
obj.style[attr]=icur+speed+'px';console.log("hello");
}
},50);
}
function?getStyle(obj,attr){
if(obj.currentStyle){
return?obj.currentStyle[attr];
}
else{
return?getComputedStyle(obj,false)[attr];
}
}
</script>
</head>
<body>
<div?id="div1"?class="a"></div>
<div?id="div2"?class="a"></div>
</body>
</html>
2016-10-20
????????var?timer; ????????window.onload?=?function(){ ????????????var?div1?=?document.getElementById("div1"); ????????????var?div2?=?document.getElementById("div2"); ????????????div1.onmouseover?=?function(){ ????????????????startMove(this,"height",300); ????????????} ????????????div1.onmouseout?=?function(){ ????????????????startMove(this,"height",100); ????????????} ????????} ????????function?startMove(obj,attr,iTarget){ ????????????clearInterval(timer); ????????????timer?=?setInterval(function(){ ????????????????var?icur?=?parseInt(getStyle(obj,attr)); ????????????????var?speed?=?(iTarget?-?icur)?/?5; ????????????????speed?=?speed?>?0???Math.ceil(speed)?:?Math.floor(speed); ????????????????if(icur==iTarget){ ????????????????????clearInterval(timer); ????????????????} ????????????????else{ ????????????????????obj.style[attr]?=?icur?+?speed?+?'px'; ????????????????} ????????????},50); ????????} ????????function?getStyle(obj,attr){ ????????????if(obj.currentStyle){ ????????????????return?obj.currentStyle[attr]; ????????????} ????????????else{ ????????????????return?getComputedStyle(obj,false)[attr]; ????????????} ????????}?var icur = parseInt(getStyle(obj,attr)); 這句寫在setInterval 里面 否則定時器不能每次獲得新的屬性值