function validEmail(email)
	{
		var invalidChars="`~!#$%^&*()+|<>?/:,; "

		for(i=0;i<invalidChars.length;i++)
		{
			var badChar=invalidChars.charAt(i);
			if(email.indexOf(badChar,0)!=-1)
			{
				return false;
			}
		}

		var atPos=email.indexOf("@",1)
		if(atPos==-1)
		{
			return false;
		}

		if(email.indexOf("@",atPos+1)!=-1)
		{
			return false;
		}

		var periodPos=email.indexOf(".",atPos)
		if(periodPos==-1)
		{
			return false;
		}

		if(periodPos+3>email.length)
		{
			return false;
		}
		return true;
	}