JS Cascade Date of birth

Last Update:2014-08-21 Source: Internet

Author: User

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<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">
<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 "/>
<title> Untitled Document </title>
<script language= "JavaScript" >
function Fun () {
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];

Give the contents of the under Decade frame first
var y = new Date (). getFullYear ();
var str = stryyyy.substring (0, stryyyy.length-9);
for (var i = (y-30); i < (y +); i++)//Based on this year, first 30 years, 30 years after
{
str + = "<option value=" + i + ">" + i + "year" + "</option>\r\n";
}
Document.form1.YYYY.outerHTML = str + "</select>";

Assign month drop-down box
var str = strmm.substring (0, strmm.length-9);
for (var i = 1; i < i++) {
str + = "<option value=" + i + ">" + i + "month" + "</option>\r\n";
}
Document.form1.MM.outerHTML = str + "</select>";

Document.form1.YYYY.value = y;
Document.form1.MM.value = new Date (). GetMonth () + 1;
var n = monhead[new Date (). GetMonth ()];
if (new Date (). GetMonth () = = 1 && ispinyear (yyyyvalue)) n++;
Writeday (n); Assign Date drop-down box
Document.form1.DD.value = new Date (). GetDate ();
}
Window.onload=fun;

function Yyyymm (str)//Change date change (mainly to judge the leap common year)
{
var mmvalue = Document.form1.mm.options[document.form1.mm.selectedindex].value;
if (Mmvalue = = "") {dd.outerhtml = Strdd; Return }
var n = monhead[mmvalue-1];
if (Mmvalue = = 2 && ispinyear (str)) n++;
Writeday (N)
}

Date linkage when function MMDD (str)//month is changed
{
var yyyyvalue = Document.form1.yyyy.options[document.form1.yyyy.selectedindex].value;
if (str = = "") {dd.outerhtml = Strdd; Return }
var n = monhead[str-1];
if (str = = 2 && ispinyear (yyyyvalue)) n++;
Writeday (N)
}

function Writeday (n)//drop-down box based on conditional write date
{
var s = strdd.substring (0, strdd.length-9);
for (var i = 1; i < (n + 1); i++)
s + = "<option value=" + i + ">" + i + "Day" + "</option>\r\n";
Document.form1.DD.outerHTML = s + "</select>";
}

function Ispinyear (year)//judge whether the leap common year
{
return (0 = = year% 4 && (year%!! = 0 | | year% 400 = = 0))
}
</script>

<body onload= "Fun ()" >
<form id= "Form1" Name= "Form1" action= "" >
<div>
<select name= "YYYY" onchange= "Yyyymm (this.value)" >
<option value= "" > Please select year </option>
</select>
<select name= "MM" onchange= "MMDD (this.value)" >
<option value= "" > select month </option>
</select>
<select name= "DD" >
<option value= "" > Select Day </option>
</select>
</div>
</form>
</body>

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

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