function validate_required(field,alerttxt)
{
	with (field)
	{
		if (value==null||value=="")
		{alert(alerttxt);return false;}
		else {return true}
	}
}
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_required(name,"please enter your name")==false)
		{name.focus();return false;}
		if (validate_email(email,"pleae enter an e-mail address of the form: user@domain.com")==false)
		{email.focus();return false;}
	}
}