I mean to say add all the 12 month cases in the switch
switch (dropdownvalue.substring(0, 3)) {
case "Jan":
dropdownvalue = "01" + dropdownvalue.substring(6, 3);
break;
case "Feb":
dropdownvalue = "02" + dropdownvalue.substring(6, 3);
break;
case "Mar":
dropdownvalue = "03" + dropdownvalue.substring(6, 3);
break;
case "Apr":
dropdownvalue = "04" + dropdownvalue.substring(6, 3);
break;
case "May":
dropdownvalue = "05" + dropdownvalue.substring(6, 3);
break;
case "Jun":
dropdownvalue = "06" + dropdownvalue.substring(6, 3);
break;
case "Jul":
dropdownvalue = "07" + dropdownvalue.substring(6, 3);
break;
case "Aug":
dropdownvalue = "08" + dropdownvalue.substring(6, 3);
break;
case "Sep":
dropdownvalue = "09" + dropdownvalue.substring(6, 3);
break;
case "Oct":
dropdownvalue = "10" + dropdownvalue.substring(6, 3);
break;
case "Nov":
dropdownvalue = "11" + dropdownvalue.substring(6, 3);
break;
case "Dec":
dropdownvalue = "12" + dropdownvalue.substring(6, 3);
break;
}
I hope you understand my point. Also do some debugging if you are having the problem.