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Javascript动画学习

2016-07-27 12:24 495 查看 
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Demo1</title>
<script type="text/javascript">
window.onload=function(){
var oDiv = document.getElementById('div1');
oDiv.onmouseover = function(){
startMove(0);
}
oDiv.onmouseout = function(){
startMove(-200)
}
}
var timer1;
var alpha = 30;
function startMove(target){
clearInterval(timer1);
timer1 = setInterval(function(){
var speed = 0;
var colorful = 5;
var oDiv = document.getElementById("div1");
if(oDiv.offsetLeft > target){
speed = -10;
}
else if(oDiv.offsetLeft < target){
speed = 10;
}
else{
clearInterval(timer1);
}
oDiv.style.left = oDiv.offsetLeft + speed +'px';
oDiv.style.filter = 'alpha(opacity:'+ colorful +')';
oDiv.style.opacity = colorful/100;

},30)
}

</script>
<style type="text/css">
body,div,span{
margin: 0;
padding: 0;
}
#div1{
width: 200px;
height: 200px;
background: red;
position: relative;
left: -200px;
top: 0;
filter:alpha(opacity:30);
opacity: 0.3;
}
#div1 span{
width: 20px;
height: 50px;
background: blue;
position: absolute;
left: 200px;
top: 75px;

}
</style>
</head>
<body>
<div id="div1">
<span id="share">分享</span>
</div>
</body>
</html>
透明度IE为
filter:alpha(opacity:30);
火狐和Chrome为
<pre name="code" class="html">opacity: 0.3;


                                            

                                        

                        
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