var digitsonly = "0123456789";

var numbersonly = "-0123456789.";

var alphanumericonly = " `'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.";

var yesnoonly = "yesnoYESNO";

var morelessonly = "morelsMORELS";

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// copyright 1999 Idocs, Inc. http://www.idocs.com

// Distribute this script freely but keep this notice in place

function limitinput(myfield, charlist, e) {
	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))
	else if (((charlist).indexOf(keychar) > -1))
		return true;
	else
	   return false;
}