// form validation

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(f_name,"A First Name must be provided")==false)
  {f_name.focus();return false;}
else if (validate_required(l_name,"A Last Name must be provided")==false)
  {l_name.focus();return false;}
else if (validate_required(address,"An Address must be provided")==false)
  {address.focus();return false;}
else if (validate_required(city,"A City must be provided")==false)
  {city.focus();return false;}
else if (validate_required(zip,"A Zip must be provided")==false)
  {zip.focus();return false;}
else if (validate_required(phone,"A Phone number must be provided")==false)
  {phone.focus();return false;}
else if (validate_required(email,"An email must be provided")==false)
  {email.focus();return false;}

}



}