function switchPro(activePro) 
{ 
   if (activePro) {
      document.getElementById('enterprise').disabled=false;
      document.getElementById('job_student').disabled=false;
      document.getElementById('job_architecte').disabled=false;
      document.getElementById('job_project_manager').disabled=false;
      document.getElementById('job_study_engineer').disabled=false;
      document.getElementById('job_commercial').disabled=false;
      document.getElementById('job_researcher_teacher').disabled=false;
      document.getElementById('job_other').disabled=false;
      document.getElementById('otherjob').disabled=false;
      document.getElementById('mda_enterprise').disabled=false;
      document.getElementById('not_mda_enterprise').disabled=false;
   }
   else { 
      document.getElementById('enterprise').disabled=true;
      document.getElementById('job_student').disabled=true;
      document.getElementById('job_architecte').disabled=true;
      document.getElementById('job_project_manager').disabled=true;
      document.getElementById('job_study_engineer').disabled=true;
      document.getElementById('job_commercial').disabled=true;
      document.getElementById('job_researcher_teacher').disabled=true;
      document.getElementById('job_other').disabled=true;
      document.getElementById('otherjob').disabled=true;
      document.getElementById('mda_enterprise').disabled=true;
      document.getElementById('not_mda_enterprise').disabled=true;
   }
}