This javascript cut & paste code snippet will allow you to instantly turn all capital letters entered into the form box to automatically be converted to lower case upon submission.

Insert this code into your BODY section

<!-- // == This Script Free To Use Providing This Notice Remains == // // == This Script Has Been Found In The http://www.DesignerWiz.com Javascript Public Archive Library == // // == NOTICE: Though This Material May Have Been In A Public Depository, Certain Author Copyright Restrictions May Apply == // --><center><form name="capsform"> <input type="text" name="caps" size=40 value="" onChange="javascript:this.value=this.value.toLowerCase();"> <br> <input type="button" value="Submit!"> </form></center>

Simply Cut and Paste Script code
Be sure to properly place script position in BODY section of html 

This script has been in the DesignerWiz.com Public Library.