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(realname,"Please fill in your name")==false)
    {realname.focus();return false}
  if (validate_required(email,"Please fill in your email")==false)
    {email.focus();return false}
  if (validate_email(email,"Not a valid e-mail address")==false)
    {email.focus();return false;}
  if (validate_required(phone,"Please fill in your phone number")==false)
    {phone.focus();return false;}
  if (validate_required(bedroomsneeded,"Please fill in the # of bedrooms")==false)
    {bedroomsneeded.focus();return false}
  }
}