JS realizes the durable joint effect

Copy code code as follows:

<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 Moon </option>

</select>

<select name = "" "

<option value = ""> Select Day </option>

</select>

</div>

<script language = "javascript">

function window.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];

// Let's give the content of the year of the year.

var y y = new date (). getfullyear ();

var str = Stryyyyy.substring (0, Stryyyyyyyyyy -Length -9);

for (var I = (y -30); i <(y+30); i ++) // This year's prevailing, the first 30 years, the next 30 years

{{

str + = "<option value = '" + I + "'>" + I + "year" + "</option>/r/n";

}

document.form1.yyyy.outerhtml = str + "</select>" ";

// The drop -down box of Fuyue

var str = strmm.substring (0, strmm.length -9);

for (var I = 1; i <13; 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); // Date down drop box

document.form1.dd.value = new date (). Getdate ();

}

Function yyyymm (STR) // The date changes when the year changes (mainly judging the year of the Ping Ping)

{{

var mmvalue = document.form1.mm.option

if (mmvalue == "") {dd.outerhtml = strdd; return;}

var n = monhead [mmvalue - 1];

if (mmvalue == 2 && ispinyear (str)) n ++;

Writeday (n)

}

Function mmdd (STR) // Monthly changing date link

{{

varyyyvalue = document.form1.yyyy.options [document.form1.yyyy.selectEdex]. Value;

if (str == "") {dd.outerhtml = strdd; return;}

var n = monhead [str -1];

if (str == 2 && ispinyear (yyyyvalue) n ++;

Writeday (n)

}

Function WRITEDAY (n) // The drop -down box of the date of writing date

{{

var s = strdd.substring (0, strdd.length -9);

for (var I = 1; i <(n+1); i ++)

s + = "<option value = '" + I + "'>" + I + "" + "</option>/r/n";

document.form1.dd.outerhtml = s + "</select>" ";

}

Function iSpinyear (year) // Judging whether to flatten the year

{{

Return (0 == Year % 4 && (year % 100! = 0 || Year % 400 == 0))

}