function verifyEmail(emailAddress)
{
	//check if the email address has a value
	if(emailAddress.length == 0)
	{
		alert("Please enter an email address");
		return false;
	}
	
	//check the email address value
	else
	{
		if(!isValid(emailAddress))
			return false;
		else
			return true;
	}
}

function isValid(emailAddress)
{
 	if (emailAddress.indexOf(' ')==-1 && 0<emailAddress.indexOf('@')&& emailAddress.indexOf('@')+1 < emailAddress.length)
	{
		if(!validChars(emailAddress))
			return false;
		else
			return true;
	}
 	else
	{
 		return false;
	}
}

function validChars(emailAddress)
{	
	var illegalChars= /[\(\)\<\>\,\;\:\\\/\"\[\]]/
	if (emailAddress.match(illegalChars))
		return false;
	else
		return true;
}