function val1()
{
 if(document.book.gb_name.value == "")
 {
   document.getElementById('msg1').innerHTML = "<= Please enter your name. (&#272;i&#7873;n t&#234;n c&#7911;a b&#7841;n.)";
   return false;
 }
}

function val2()
{
 if(document.book.gb_location.value == "")
 {
   document.getElementById('msg2').innerHTML = "<= Please select a country. (Ch&#7885;n qu&#7889;c gia b&#7841;n c&#432; ng&#7909;.)";
   return false;
 }
}

function val3()
{
 if(document.book.gb_gender.value == "")
 {
   document.getElementById('msg3').innerHTML = "<= Please select gender. (Ch&#7885;n gi&#7899;i t&#237;nh.)";
   return false;
 }
}

function val4()
{
 if(document.book.gb_comment.value == "")
 {
   document.getElementById('msg4').innerHTML = "Please provide a little comment. (Xin &#273;&#7863;t c&#226;u h&#7887;i.)";
   return false;
 }
}

function val5()
{
 if(document.book.gb_captcha.value == "")
 {
   document.getElementById('msg5').innerHTML = "<= Please enter Access Code. (&#272;i&#7873;n Access Code.)";
   return false;
 }
}

function checkForm()
{
  if(document.book.gb_name.value == "")
 {
   document.getElementById('msg1').innerHTML = "<= Please enter your name. (&#272;i&#7873;n t&#234;n c&#7911;a b&#7841;n.)";
   return false;
 }
 if(document.book.gb_location.value == "")
 {
   document.getElementById('msg2').innerHTML = "<= Please select a country. (Ch&#7885;n qu&#7889;c gia b&#7841;n c&#432; ng&#7909;.)";
   return false;
 }
 if(document.book.gb_gender.value == "")
 {
   document.getElementById('msg3').innerHTML = "<= Please select gender. (Ch&#7885;n gi&#7899;i t&#237;nh.)";
   return false;
 }
 if(document.book.gb_comment.value == "")
 {
   document.getElementById('msg4').innerHTML = "Please provide a little comment. (Xin &#273;&#7863;t c&#226;u h&#7887;i.)";
   return false;
 } 
  if(document.book.gb_captcha.value == "")
 {
   document.getElementById('msg5').innerHTML = "<= Please enter Access Code. (&#272;i&#7873;n Access Code.)";
   return false;
 }
}