Get time value from textbox and perform calculations?
<p>I'm trying to retrieve a time value from a textbox and perform calculations on it</p>

<p>i.e User inputted time (8:00 am) - (30 minutes)</p>

<p>I'm getting the value by the getElementById method but I am unsure of how to make it be read as a time and do the calculations.</p>

<p>Could someone point me in the right direction please?</p>
