How do I find out the first digit of a textbox value in asp.net/javascript?
<p>I would like to find the first digit of the value in a textbox in order to execute some conditional code. I can get the textbox by using getElementById, and would like to execute my code if the first digit contained within the textbox is 7, 8, or 9.</p>

<p>How can I test to see if the first digit of my textbox is between 7 and 9?</p>
