function isAlpha(str)
{
	var re = /[^a-zA-Z]/g
  	if( re.test(str) )
	{
		return 0;
	}
  	else
	{
		return 1;
	}
}

function isInteger(s)
{
	var i;
	for (i = 0; i < s.length; i++)
	{   
		// Check that current character is number.
		var c = s.charAt(i);
		if (((c < "0") || (c > "9"))) return 0;
	}
	// All characters are numbers.
	return 1;
}

function isPhoneNumber(str)
{
	var re = /^\(?[2-9]\d{2}[\)\.-]?\s?\d{3}[\s\.-]?\d{4}$/
  	return re.test(str);
}