一排div自由下落 

function getstyle(obj,attr)
{
    return obj.currentStyle?obj.currentStyle[attr]:getComputedStyle(obj)[attr];
}

/*function domove (obj,attr,dir,target,endfn)
{
    dir = parseInt(getstyle(obj,attr)) < target? dir: -dir;
    clearInterval(obj.timer);
    obj.timer = setInterval( function ()
    {
        var speed = parseInt(getstyle(obj,attr)) + dir;
        if(speed > target&& dir >0 || speed < target && dir < 0)
        {
            speed = target;
        }
        obj.style[attr] = speed + 'px';
        if(speed == target)
        {
            clearInterval(obj.timer);
　　　　　　  endfn&&endfn();
        } 
        
    },30)
}*/

function domove (obj,attr,dir,target,endfn)
{
    dir = parseInt(getstyle(obj,attr))<target?dir:-dir;
    clearInterval(obj.timer);
    obj.timer = setInterval( function ()
    {
        var speed = parseInt(getstyle(obj,attr)) + dir;
        if(dir>0&&speed>target||dir<0&&speed<target)
        {
            speed = target;
        }
        obj.style[attr] = speed + 'px';
        if( speed == target )
        {
            clearInterval(obj.timer);
        }
        endfn&&endfn();
    },50); 
};
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>

<script src="float.js"></script>
<script type="text/javascript">
window.onload = function ()
{
    var timer = null ;
    var num = 0;
    var len = 20;
    var str = '';
    var adiv = document.getElementsByTagName('div');
    
    for( var i = 0; i < len; i++)
    {
        str += '<div style="width:50px; height:50px; background:red; position:absolute; top:0px; left:'+ i*60 +'px;"></div>';
    }
    
    document.body.innerHTML = str;
    
    /*document.onclick = function ()
    {
        clearInterval(timer);
        timer = setInterval( function ()
        {
            domove(adiv[num],'top',23,500)
            num++;
            if( num == len )
            {
                clearInterval(timer);
            }  
        },100)
    };*/
    
    document.onclick = function ()
    {
        clearInterval(timer);
        timer = setInterval( function ()
        {
            domove(adiv[num],'top',23,500)
            num++;
            if(len == num )
            {
                clearInterval(timer);
            }
        },100);
    }
};
</script>

</head>

<body>
</body>
</html>

今天状态不佳（事实确实如此，其实都是借口 TAT）

看别人写了20分钟的代码 自己练了4遍以后 才能一口气准确无误的写出来 告诉我的智商怎么了 拿什么救你

然后说正经的

就是有些传参的时候参数的拼写大小写 一定要注意注意注意！！！！！！！！！！！

 

posted @ 2014-12-22 19:59  mayufo  阅读(276)  评论(0)  编辑  收藏  举报