function validate_email(field,alerttxt)
{
	with (field)
	{
	apos=value.indexOf("@")
	dotpos=value.lastIndexOf(".")
		if (apos<1||dotpos-apos<2) 
		{alert(alerttxt);return false}
		else {return true}
	}
}
function validate_form(thisform)
{
	with (thisform)
	{
		if (validate_email(email,"Not a valid e-mail address!")==false)
		{email.focus();return false}
	}
}