function allowNumbersOnly(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;
	else
	{
		alert("Please enter numeric characters only. 0-9");
		return false;
	}
}

function allowPhoneNumbersOnly(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;
	else
	{
		alert("Please enter numeric characters only. 0-9");
		return false;
	}
}


function allowLettersOnly(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 ((("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ").indexOf(keychar) > -1))
		return true;
	else
	{	alert("Please enter alphabetic characters only. a-z  A-Z");
		return false;
	}
}


function allowAlphaNumOnly(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 ((("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789").indexOf(keychar) > -1))
		return true;
	else
	{	alert("Please enter alphabetic and numeric characters only. a-z  A-Z  0-9");
		return false;
	}
}