function check_fields_complete(){
  
      var flag = true; //return value

      var login_er = document.getElementById('login_error');
      login_er.style.display="none";

      var passwords_er = document.getElementById('passwords_error');
      passwords_er.style.display="none";

      var fname_er = document.getElementById('fname_error');
      fname_er.style.display="none";

      var lname_er = document.getElementById('lname_error');
      lname_er.style.display="none";

      var email_er = document.getElementById('email_error');
      email_er.style.display="none";

      var ppc_er = document.getElementById('ppc_error');
      ppc_er.style.display="none";

      var country_er = document.getElementById('country_error');
      country_er.style.display="none";



      if(document.getElementById('password1').value != document.getElementById('password2').value){
          passwords_er.style.display="inline";
          flag = false;
      }
      if(!checkMail()){
          email_er.style.display="inline";
          flag = false;
      }

      if(document.getElementById('login_reg').value == ''){
          login_er.style.display="inline";
          flag = false;
      }
      if((document.getElementById('password1').value == '') || (document.getElementById('password2').value == '')){
          passwords_er.style.display="inline";
          flag = false;
      }
      if(document.getElementById('fname').value == ''){
          fname_er.style.display="inline";
          flag = false;
      }
      if(document.getElementById('lname').value == ''){
          lname_er.style.display="inline";
          flag = false;
      }

      if(document.getElementById('ppc').value == 0){
          ppc_er.style.display="inline";
          flag = false;
      }
      if(document.getElementById('country').value == 0){
          country_er.style.display="inline";
          flag = false;
      }


      return flag;
}
function checkMail()
{
        var x = document.getElementById('email').value;
//      var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
        var filter  = /^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
        if (filter.test(x)) return true;
        else return false;

}