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PO
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16930500
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0
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2013-06-05T02:15:31.213
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2013-06-05T02:22:31.260
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2013-06-05T02:22:31.260
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257182
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257182
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16930419
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2
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text
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Calculating age in years, months and days is a bit trickier than it should be due to the differences in month and year lengths. Here's a function that will return the difference between two dates in years, months, days, hours, minutes and seconds. <pre><code>function dateDifference(start, end) { // Copy date objects so don't modify originals var s = new Date(+start); var e = new Date(+end); var timeDiff, years, months, days, hours, minutes, seconds; // Get estimate of year difference years = e.getFullYear() - s.getFullYear(); // Add difference to start, if greater than end, remove one year // Note start from restored start date as adding and subtracting years // may not be symetric s.setFullYear(s.getFullYear() + years); if (s > e) { --years; s = new Date(+start); s.setFullYear(s.getFullYear() + years); } // Get estimate of months months = e.getMonth() - s.getMonth(); months += months < 0? 12 : 0; // Add difference to start, adjust if greater s.setMonth(s.getMonth() + months); if (s > e) { --months; s = new Date(+start); s.setFullYear(s.getFullYear() + years); s.setMonth(s.getMonth() + months); } // Get remaining time difference, round to next full second timeDiff = (e - s + 999) / 1e3 | 0; days = timeDiff / 8.64e4 | 0; hours = (timeDiff % 8.64e4) / 3.6e3 | 0; minutes = (timeDiff % 3.6e3) / 6e1 | 0; seconds = timeDiff % 6e1; return [years, months, days, hours, minutes, seconds]; } </code></pre> You can abbreviate the above just after the year part and return just that if you want. Note that in your code: <pre><code>var cmbmonth=parseInt(document.getElementById("cmbmonth").options[document.getElementById("cmbmonth").selectedIndex].value); </code></pre> can be: <pre><code>var cmbmonth = document.getElementById("cmbmonth").value; </code></pre> There is no need for parseInt, the Date constructor will happily work with string values. If you have used calendar month numbers for the values (i.e. Jan = 1) then subtract 1 before giving it to the Date constructor, but simpler to use javascript month indexes for the values (i.e. Jan = 0). You can then do: <pre><code>var diff = dateDifference(new Date(cmbyear, cmbmonth, cmbdate), new Date()); if (diff[0] < 18) { // sorry, under 18 } </code></pre>
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1. POJavascript - Age Verification
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1. PTAnswer
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1. USRobG
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1. USRobG
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