Regular Expression for MM/DD/YYYY in Javascript

Question

I\'ve just written this regular expression in javaScript however it doesn\'t seem to work, here\'s my function:

function isGoodDate(dt){
    var reGoodDate =         


        

Answer 1

I agree with @KooiInc, but it is not enough to test for NaN

function isGoodDate(dt){
    var dts  = dt.split('/').reverse()
       ,dateTest = new Date(dts.join('/'));
    return !isNaN(dateTest) && 
       dateTest.getFullYear()===parseInt(dts[0],10) &&
       dateTest.getMonth()===(parseInt(dts[1],10)-1) &&
       dateTest.getDate()===parseInt(dts[2],10) 
}

which will handle 29/2/2001 and 31/4/2011

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For this script to handle US dates do

function isGoodDate(dt){
    var dts  = dt.split('/')
       ,dateTest = new Date(dt);
    return !isNaN(dateTest) && 
       dateTest.getFullYear()===parseInt(dts[2],10) &&
       dateTest.getMonth()===(parseInt(dts[0],10)-1) &&
       dateTest.getDate()===parseInt(dts[1],10) 
}