进度条 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>

<style>
#wrap{
    position:relative;
    border:1px #000 solid;
    height:50px;
    width:640px;
    margin:200px auto;
    }
#bg{
    position:absolute;
    top:0px;
    left:0px;
    height:50px;
    width:0px;
    background:pink;
    }
span{
    width:50px;
    height:50px;
    font-size:28px;
    line-height:50px;
    text-align:center;
    position:absolute;
    top:0px;
    }    

</style>
<script src="float.js"></script>
<script type="text/javascript">
window.onload = function ()
{
    var ospan = document.getElementsByTagName('span');
    var timer = null;
    var num = 0;
    
    for ( var i = 0; i < ospan.length; i++)
    {
        ospan[i].style.left = 20 + i*55 +'px';
        
    }
    
    document.onclick = function ()
    {
        var ospan = document.getElementsByTagName('span');
        var obg = document.getElementById('bg');
        clearInterval(timer);
        domove(obg,'width',50,90,640);
        opacity(obg,10,0,150);
        timer = setInterval(function()
        {
            domove(ospan[num],'top',10,50,-150);
            opacity(ospan[num],10,0,80);
            num++;
            if(num==ospan.length)
            {
                clearInterval(timer);
            }
        },50)
    };
    
    
};
</script>

</head>

<body>

<div id="wrap">
    <div id="bg"></div>
    <span>+1</span>
    <span>+1</span>
    <span>+1</span>
    <span>+1</span>
    <span>+1</span>
    <span>+1</span>
    <span>+1</span>
    <span>+1</span>
    <span>+1</span>
    <span>+1</span>
    <span>+1</span>
</div>
</body>
</html>
function getstyle(obj,attr)
{
    return obj.currentStyle?obj.currentStyle[attr]:getComputedStyle(obj)[attr];
}


function domove (obj,attr,step,frequency,target,endfn)
{
    step = parseInt(getstyle(obj,attr))<target?step:-step;
    clearInterval(obj.timer);
    obj.timer = setInterval( function ()
    {
        var speed = parseInt(getstyle(obj,attr)) + step;
        if(step>0&&speed>target||step<0&&speed<target)
        {
            speed = target;
        }
        obj.style[attr] = speed + 'px';
        if( speed == target )
        {
            clearInterval(obj.timer);
            endfn&&endfn();
        }
    },frequency); 
};

function opacity(obj,step,target,frequency,endfn)
{
    var currentOpacity = getstyle(obj,'opacity') * 100;
    step = currentOpacity < target?step:-step;
    clearInterval(obj.opacity)
    obj.opacity = setInterval (function ()
    {
        currentOpacity = getstyle(obj,'opacity') *100;
        var nextOpacity = currentOpacity + step;
        if(step>0&& nextOpacity>target || step<0&& nextOpacity < target )
        {
            nextOpacity = target;
        }
    obj.style.opacity = nextOpacity/100;
    obj.style.filter = 'alpha(opacity:)' + nextOpacity +')';
    if(nextOpacity == target )
    {
        clearInterval(obj.opacity);
        endfn&&endfn();
    }    
    },frequency);
    
    
};

function shake(obj,attr,endfn)
{
    if( obj.shaked ) { return;  }
    obj.shaked = true;
    
    var num = 0;
    var timer = null;
    var arr = [];
    var pos = parseInt(getstyle(obj,attr));
    
    for( var i = 20; i > 0; i-=2 )
    {
        arr.push(i,-i);
    }
    arr.push(0);
    
    clearInterval(obj.shake);
    obj.shake = setInterval(function ()
    {
        obj.style[attr] = pos + arr[num] +'px';
        num++;
        if(num==arr.length)
        {
            clearInterval(obj.shake);
            endfn&&endfn();
            obj.shaked = false;
        }
    },50);
};

 

posted @ 2014-12-23 15:21  mayufo  阅读(86)  评论(0)    收藏  举报