function validate_required(field,alerttxt)
{
with (field)
{
if (value==null||value=="")
  {alert(alerttxt);return false;}
else {return true}
}
}function validate_form(thisform)
{
with (thisform)
{
if (validate_required(a_name,"Please enter your name")==false)
  {a_name.focus();return false;}
if (validate_required(email,"Please enter your email address")==false)
  {email.focus();return false;} 
if (validate_required(k_arriv,"Please select your arrival date")==false)
  {k_arriv.focus();return false;}  
if (validate_required(l_deprt,"Please select your departure date")==false)
  {l_deprt.focus();return false;}
if (validate_required(m_propt,"Please let us know what property your interested in")==false)
  {m_propt.focus();return false;} 
if (validate_required(n_rmtyp,"Please tell us what room type you need")==false)
  {n_rmtyp.focus();return false;} 
if (validate_required(o_adults,"How many adults")==false)
  {o_adults.focus();return false;} 
if (validate_required(p_kids,"How many children")==false)
  {p_kids.focus();return false;} 
if (validate_required(q_units,"How many units")==false)
  {q_units.focus();return false;} 
}
}