function _is_numeric(obj){
	/*
	Parameters:
		String
	Returns:
		boolean
	Purpose:
		Ensures that incoming value is numeric
	*/
	if(isNaN(obj) || obj.length == 0){
		return false;
	}
	return true;
}

function validateForm(obj){
	if(!_is_numeric(obj.n1.value)){
		alert('you must enter numbers in the the area code field');
		obj.focus();
		return false;
	}
}

function ValidateForm(obj){
	if(!_is_numeric(obj.n2.value)){
		alert('you must enter a number in the first 3 digits of the phone number')
		obj.focus();
		return false;
	}
}

function ValidateForm(obj){
	if(!_is_numeric(obj.n3.value)){
		alert('you must enter a number in the last 4 digits of the phone number')
		obj.focus();
		return false;
	}
}