/*
	This script forces a form field to only accept text.
	Include this file in the head of the doc
	Example of usage: <INPUT NAME="dollar" SIZE=5 MAXLENGTH=5 onKeyPress="return numbersonly(this, event)">
	http://www.html-html.com/forms/index_famsupp_158.html
*/

function numbersonly(myfield, e, dec)
{
var key;
var keychar;
if (window.event)
 key = window.event.keyCode;
else if (e)
 key = e.which;
else
 return true;
keychar = String.fromCharCode(key);
// control keys
if ((key==null) || (key==0) || (key==8) || 
 (key==9) || (key==13) || (key==27) )
 return true;
// numbers
else if ((("0123456789").indexOf(keychar) > -1))
 return true;
// decimal point jump
else if (dec && (keychar == "."))
 {
 myfield.form.elements[dec].focus();
 return false;
 }
else
 return false;
}