放飞自我 LET DREAMS FLY

[t]手风琴效果

要点：
计算非当前元素的宽度，然后用总宽度减去，即时得到当前的宽度
设置计时器的领结点

html

<!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>手风琴效果</title>
<style type="text/css">
    * { padding: 0; margin: 0; }
    li { list-style: none; }
    body { background: #f6f9fc; }
    
    div { width: 660px; height: 254px; border: 1px solid #ccc; margin: 50px auto 0; overflow:hidden; }
    ul { width: 3300px; height: 254px; }
    ul li { width: 22px; height: 254px; float: left; position: relative; overflow:hidden; }
    .active { width: 550px; }
    ul span { width: 21px; height: 244px; padding-top: 10px; border-right: 1px solid #fff; position: absolute; top: 0; right: 0; color: #fff; font-size: 12px; text-align: center; cursor: pointer; }
    ul img { width: 550px; height: 254px; }
    .bg0 { background: #00FFCC; }
    .bg1 { background: #636363; }
    .bg2 { background: #3d7fbb; }
    .bg3 { background: #5ca716; }
    .bg4 { background: #f28b24; }
    .bg5 { background: #7c0070; }    
</style>
<script src="dome.js"></script>
</head>

<body>

<div id="show1">
    <ul>
        <li class="active">
            <span class="bg0">这是第一个</span>
            <img src="images/1.jpg" />
        </li>
        <li>
            <span class="bg1">这是第二个</span>
            <img src="images/2.jpg" />
        </li>
        <li>
            <span class="bg2">这是第三个</span>
            <img src="images/3.jpg" />
        </li>
        <li>
            <span class="bg3">这是第四个</span>
            <img src="images/4.jpg" />
        </li>
        <li>
            <span class="bg4">这是第五个</span>
            <img src="images/5.jpg" />
        </li>
        <li>
            <span class="bg5">这是第六个</span>
            <img src="images/6.jpg" />
        </li>
    </ul>
</div>

</body>
</html>

dome.js

window.onload=function ()
{
    createAccordion('show1');
};

function createAccordion(id){
    var oDiv = document.getElementById(id);
    var aLi = oDiv.getElementsByTagName('li');
    var aSpan = oDiv.getElementsByTagName('span');
    
    var iMinWidth = 9999;
    var i=0;
    
    oDiv.timer = null;
    
    for(i=0; i<aLi.length; i++){
        aSpan[i].index = i;
        aSpan[i].onmouseover = function(){
            gotoImg(oDiv, this.index, iMinWidth);
        }
        iMinWidth = Math.min(iMinWidth, aLi[i].offsetWidth);
    }
}

function gotoImg(oDiv, iIndex, iMinWidth){
    oDiv.timer ? clearInterval(oDiv.timer) : '';
    oDiv.timer = setInterval(function(){
        changeWidthInner(oDiv, iIndex, iMinWidth);
    }, 30);
}

function changeWidthInner(oDiv, iIndex, iMinWidth){
    var aLi = oDiv.getElementsByTagName('li');
    var aSpan = oDiv.getElementsByTagName('span');
    var iWidth=oDiv.offsetWidth;
    var bEnd = true;
    var w=0;
    var i=0;
    
    for(i=0; i<aLi.length; i++){
        if(i==iIndex){
            continue;
        }
        if(aLi[i].offsetWidth == iMinWidth){
            iWidth -= iMinWidth;
            continue;
        }
        
        bEnd = false;
        
        var speed = Math.ceil((aLi[i].offsetWidth - iMinWidth)/5);
        w = aLi[i].offsetWidth - speed;
        if(w <= iMinWidth){
            w = iMinWidth;
        }
        aLi[i].style.width = w + 'px';
        
        iWidth -= w;
    }
    
    aLi[iIndex].style.width = iWidth + 'px';
    
    bEnd ? clearInterval(oDiv.timer) : '';
}

posted on 2012-11-15 16:09  niuben  阅读(148)  评论(0)  编辑  收藏  举报

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