What's a simple way to convert between an am/pm time to 24 hour time in javascript

Question

I\'ve been playing with jquery and I\'ve run myself into a time problem. I\'ve got 3 time input select boxes, one for hours, one for minutes, and one for the Meridian. I need to

Answer 1

Example of tj111 suggestion:

$("#ConditionValue").val(
    (
        new Date(
            "01/01/2000 " + 
            $("#EventCloseTimeHour option:selected").text() +
            $("#EventCloseTimeMin option:selected").text() + ":00" +
            " " +
            $("#EventCloseTimeMeridian option:selected").text()
        )
    ).toTimeString().slice(0,8))
;

Or you can use:

hour = hour %12 + (meridian === "AM"? 0 : 12);
hour = hour < 10 ? "0" + hour : hour;