<style>#sys{position:relative}#apply{position:absolute;left:140px;top:60px;}</style>
<body>
<div id="sys"><img src="http://www.google.cn/logos//newton10-tree.jpg" width="384" /><img src="http://www.google.cn/logos//newton10-apple.png" width="26" id="apply"></div>
</body>
<script>
function fx(play,end,len) {
var play=play||Date,end=end||Date,s=0,t=0,len=(len||800)/10,
th,p=Math.pow,fx=function(x){
if ((x) < (1/2.75)) {
return (7.5625*x*x);
} else if (x < (2/2.75)) {
return (7.5625*(x-=(1.5/2.75))*x + .75);
} else if (x < (2.5/2.75)) {
return (7.5625*(x-=(2.25/2.75))*x + .9375);
} else {
return (7.5625*(x-=(2.625/2.75))*x + .984375);
}
},c=function(f,t){return +f+(t-f)*s};
return th = setInterval(function() {
var xy=t++/len;
play(c,xy,s=fx(xy));
if(s==1)end(clearInterval(th))
},10);
};
setTimeout(function (){
fx(function (x,y){
apply.style.top=x(60,400)+'px';
if(y>.364)apply.style.left=140+(.364-y)*80+'px'
})
},2000);
</script>
转载于:https://www.cnblogs.com/huicheng/archive/2010/04/09/1708397.html
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