function CheckPhoneNumber(PhoneNo,TagStr)
{
	// get rid of non-numerics
	var checkOK = new String("0123456789");
	var strNo = new String(PhoneNo.value);
	PhoneNo.value="";
	for ( i = 0; i < strNo.length; i++ )
	{
		ch = strNo.charAt(i);
		for (j = 0;  j < checkOK.length;  j++)
			if (ch == checkOK.charAt(j))
				break;
		if (j != checkOK.length)
		{
			PhoneNo.value=String(PhoneNo.value)+String(ch);
		}
	}
	// get rid of leading 1
	if ( ( PhoneNo.value.length == 11 ) && ( PhoneNo.value.charAt(0) == 1 ) )
	{
		PhoneNo.value = PhoneNo.value.substr(1,10);
	}
	if ( (PhoneNo.value.length != 0) && (PhoneNo.value.length < 10) )
	{
		alert("Please enter exactly 10 digits in \"" + TagStr + "\".");
		PhoneNo.focus();
		return (false);
	}
	if (PhoneNo.value.length == 0)
	{
		alert("Please enter exactly 10 digits in \"" + TagStr + "\".");
		PhoneNo.focus();
		return (false);
	}
	if (PhoneNo.value.length > 10)
	{
		alert("Please enter exactly 10 digits in \"" + TagStr + "\".");
		PhoneNo.focus();
		return (false);
	}
	var checkStr = PhoneNo.value;
	var allValid = true;
	var decPoints = 0;
	for (i = 0;  i < checkStr.length;  i++)
	{
		ch = checkStr.charAt(i);
		for (j = 0;  j < checkOK.length;  j++)
		if (ch == checkOK.charAt(j))
		break;
		if (j == checkOK.length)
		{
			allValid = false;
			break;
		}
	}
	if (!allValid)
	{
		alert("Please enter only digits in \"" + TagStr + "\".");
		PhoneNo.focus();
		return (false);
	}
	if ( checkStr.length == 10 )
	{
		if ( checkStr.charAt(0) < '2' )
		{
			alert("The first digit of the area code in \"" + TagStr + "\" cannot be a '1' or '0'");
			PhoneNo.focus();
			return (false);
		}
		if ( checkStr.charAt(3) < '2' )
		{
			alert("The first digit of the prefix in \"" + TagStr + "\" cannot be a '1' or '0'");
			PhoneNo.focus();
			return (false);
		}
		if ( checkStr.substring(0,3) == "900" )
		{
			alert("The area code in \"" + TagStr + "\" cannot be '900'");
			PhoneNo.focus();
			return (false);
		}
	}
	return (true);
}