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javascript 日期

Posted on 2007-03-02 12:12 江海魚閱讀(77) 評論(0) 編輯收藏所屬分類: javascript

function ?leapYear(year)

{

if ?(year? % ? 400 ? == ? 0 )? return ? true ;

if ?(year? % ? 4 ? == ? 0 ? && ?year? % ? 100 ? != ? 0 )? return ? true ;

return ? false ;

}

function ?validDate(year,?month,?date)

{

year? = ?parseInt(year);

month? = ?parseInt(month);

date? = ?parseInt(date);

if ?(isNaN(year)? || ?isNaN(month)? || ?isNaN(date))? {

return ? false ;

}

if ?(year? < ? 1 ? || ?month? < ? 1 ? || ?month? > ? 12 ? || ?date? < ? 1 ? || ?date? > ? 31 )? {

return ? false ;

}

if ?(month? == ? 2 ? && ?date? == ? 29 )? {

return ?leapYear(year);

}

if ?(month? == ? 4 ? || ?month? == ? 6 ? || ?month? == ? 9 ? || ?month? == ? 11 )? {

return ?(date? <= ? 30 );

}

return ?(month? != ? 2 ? || ?date? <= ? 28 );

}