js相关小实例——时间联动 

代码如下：
<!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>
</head>

<body>

<select id="nian" onclick="biantian()"></select>年
<select id="yue" onclick="biantian()"></select>月
<select id="tian"></select>日

<script type="text/javascript">
FillNian();
FillYue();
FillTian();
function FillNian()
{
    var b = new Date(); //获取当前时间
    var nian = parseInt(b.getFullYear());
    
    var str = "";
    
    for(var i=nian-5;i<nian+6;i++)
    {
        str = str+"<option value='"+i+"'>"+i+"</option>";
    }
    
    document.getElementById("nian").innerHTML = str;
    
}

function FillYue()
{
    var str = "";
    for(var i=1;i<13;i++)
    {
        str = str+"<option value='"+i+"'>"+i+"</option>";
    }
    document.getElementById("yue").innerHTML = str;
}

function FillTian()
{
    var yue = document.getElementById("yue").value;
    var nian = document.getElementById("nian").value;
    var ts = 31;
    
    if(yue==4 || yue==6 || yue==9 || yue==11)
    {
        ts=30;
    }
    
    if(yue==2)
    {
        if((nian%4==0 && nian%100 != 0) || nian%400==0)
        {
            ts = 29;
        }
        else
        {
            ts = 28;
        }
    }
    
    var str = "";
    for(var i=1;i<ts+1;i++)
    {
        str = str+"<option value='"+i+"'>"+i+"</option>";
    }
    document.getElementById("tian").innerHTML = str;

    
    
}


function biantian()
{
    FillTian();
}
</script>
</body>
</html>

结果：

 

posted @ 2017-03-11 13:51  彬彬有礼☆  阅读(171)  评论(0)  编辑  收藏  举报