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<html> <body> <input type="date" id="txtStartDate" /> <input type="date" id="txtEndDate" /> <button id="btnCalculate2" onclick="fnCalculateAgeFromGivesDates();" >Calculate Age</button> <script> function fnCalculateAgeFromGivesDates(){ var startDateInput = document.getElementById("txtStartDate").value; var endDateInput = document.getElementById("txtEndDate").value; // convert user input values into date object var startDate = new Date(startDateInput); var endDate = new Date(endDateInput); // get difference between two date; var difference=endDate - startDate.getTime(); var ageDate = new Date(difference); var calculatedAge= Math.abs(ageDate.getUTCFullYear() - 1970); alert(calculatedAge); } </script> </body> </html>
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