function isEmail(str) 
{
	var pattern = "[a-zA-Z0-9._%-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}";
	
	if (str.search (pattern))
		return false;
	else
		return true;
}

function isNumber(str) 
{
	var pattern = "0-9";
	
	if (str.search (pattern))
		return false;
	else
		return true;
}