function validate_email(field,alerttxt) {
  with (field) {
	apos=value.indexOf("@");
	dotpos=value.lastIndexOf(".");
	if (apos<1||dotpos-apos<2) {
		document.getElementById("errorbox").innerHTML="";
		document.getElementById('errorbox').innerHTML +=  alerttxt ;return false;}
	else {document.getElementById("errorbox").innerHTML="";
		document.getElementById('errorbox').innerHTML +=  "Thank you!" ;return true;}}}

function validate_required(field,alerttxt) {
  with (field)
	{if (value==null||value=="")
 		{document.getElementById("errorbox").innerHTML="";
		document.getElementById('errorbox').innerHTML +=  alerttxt ;return false;}
	else {document.getElementById("errorbox").innerHTML="";
		document.getElementById('errorbox').innerHTML +=  "Thank you!" ;return true;}}}

function validate_form(form2) {
  with (form2) {
	if (validate_email(email,"<span style='color:red;'>Not a valid e-mail address!</span>")==false) {
		email.focus();return false;}}}