年月日三下拉框联动

来源：互联网发布：红孩儿大话火焰山知乎编辑：程序博客网时间：2024/05/16 06:23
年月日三下拉框联动(IE)

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<html>
<head>
<title>年月日三下拉框联动</title>
<meta http-equiv='Content-Type'content='text/html; charset=gb2312'>
</head>
 
<body>
<form name=form1>
<select name=YYYY onchange="YYYYMM(this.value)">
<option value="">请选择 年</option>
</select>
<select name=MM onchange="MMDD(this.value)">
<option value="">选择 月</option>
</select>
<select name=DD>
<option value="">选择 日</option>
</select>
</form>
 
<script language="JavaScript"><!--
functionwindow.onload()
{
strYYYY = document.form1.YYYY.outerHTML;
strMM = document.form1.MM.outerHTML;
strDD = document.form1.DD.outerHTML;
MonHead = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
 
//先给年下拉框赋内容
vary = newDate().getFullYear();
varstr = strYYYY.substring(0, strYYYY.length - 9);
for(vari = (y-30); i < (y+30); i++) //以今年为准，前30年，后30年
{
str += "<option value='" + i + "'> " + i + " 年" + "</option>\r\n";
}
document.form1.YYYY.outerHTML = str +"</select>";
 
//赋月份的下拉框
varstr = strMM.substring(0, strMM.length - 9);
for(vari = 1; i < 13; i++)
{
str += "<option value='" + i + "'> " + i + " 月" + "</option>\r\n";
}
document.form1.MM.outerHTML = str +"</select>";
 
document.form1.YYYY.value = y;
document.form1.MM.value = newDate().getMonth() + 1;
varn = MonHead[newDate().getMonth()];
if(newDate().getMonth() ==1 && IsPinYear(YYYYvalue)) n++;
writeDay(n);//赋日期下拉框
document.form1.DD.value = newDate().getDate();
}
functionYYYYMM(str) //年发生变化时日期发生变化(主要是判断闰平年)
{
varMMvalue = document.form1.MM.options[document.form1.MM.selectedIndex].value;
if(MMvalue == ""){DD.outerHTML = strDD; return;}
varn = MonHead[MMvalue - 1];
if(MMvalue ==2 && IsPinYear(str)) n++;
writeDay(n)
}
functionMMDD(str) //月发生变化时日期联动
{
varYYYYvalue = document.form1.YYYY.options[document.form1.YYYY.selectedIndex].value;
if(str == ""){DD.outerHTML = strDD; return;}
varn = MonHead[str - 1];
if(str ==2 && IsPinYear(YYYYvalue)) n++;
writeDay(n)
}
functionwriteDay(n) //据条件写日期的下拉框
{
vars = strDD.substring(0, strDD.length - 9);
for(vari=1; i<(n+1); i++)
s += "<option value='" + i + "'> " + i + " 日" + "</option>\r\n";
document.form1.DD.outerHTML = s +"</select>";
}
functionIsPinYear(year)//判断是否闰平年
{return(0 == year%4 && (year0 !=0 || year%400 == 0))}
//--></script>
<p>查找更多代码，请访问：<a href="http://www.lanrentuku.com"target="_blank">懒人图库</a></p>
</body>
</html>