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 goTo(field)
{
	var p = location.href.split("/");
	p[p.length-1]="";
	p=p.join("/");
	field.value = p + "signedup.html";
}

function validate_form(thisform)
{
with (thisform)
  {
  if (validate_email(email,"Not a valid e-mail address!")==false)
    {email.focus();return false;}
  else
  goTo(returl);
  
	}
}