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checkdate:
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Function:
checkdate
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Description:
Returns true(1) if it is a valid date in gregorian calendar.
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function checkdate (m, d, y) { // http://jsphp.co/jsphp/fn/view/checkdate // + original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net) // + improved by: Pyerre // + improved by: Theriault // * example 1: checkdate(12, 31, 2000); // * returns 1: true // * example 2: checkdate(2, 29, 2001); // * returns 2: false // * example 3: checkdate(3, 31, 2008); // * returns 3: true // * example 4: checkdate(1, 390, 2000); // * returns 4: false return m > 0 && m < 13 && y > 0 && y < 32768 && d > 0 && d <= (new Date(y, m, 0)).getDate(); }
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