慕圣3402802
2019-04-25 16:33
<script>
window.onload = function(){
var oMove = document.getElementById('myDiv');
var oList = oMove.getElementsByTagName('a');
for(var i=0; i<oList.length; i++){
oList[i].onmouseover = function(){
var _this = this.getElementsByTagName('i')[0];
startMode(_this,{top:-3,opacity:0},function(){
_this.style.opacity = 100;
startMode(_this,{top:3,opacity:100})
});
}
}
}
</script>
//框架
function startMode(obj,json,fn){
clearInterval(obj.timer);
obj.timer = setInterval(function(){
var flag = true;
for(var attr in json){
var icur = 0;
if(attr=='opacity'){
icur = parseFloat(getStyle(obj,attr))*100;
}else{
icur = parseInt(getStyle(obj,attr));
}
var speed = (json[attr]-icur)/8;
speed>0?Math.ceil(speed):Math.floor(speed);
if(json[attr] != icur){
flag = false;
}
if(attr == 'opacity'){
obj.style.opacity = (icur+speed)/100;
obj.style.filter = 'alpha(opacity'+(icur+speed)+')';
}else{
obj.style[attr] = icur + speed+'px';
}
}
if(flag){
clearInterval(obj.timer);
if(fn){
fn();
}
}
},30)
}
function getStyle(obj,attr){
if(obj.currentStyle){
return obj.currentStyle[attr];
}else{
return getComputedStyle(obj,false)[attr];
}
}
speed>0?Math.ceil(speed):Math.floor(speed);不对
speed=speed>0?Math.ceil(speed):Math.floor(speed);
JS动画效果
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