function doSearchEntFrmCbx() {
    if (canContiniousFrmCbx()){
      document.forms['form_rech_frm_cbx'].submit();
    }else{
        alert("Veuillez saisir au moins un critère.");
    }
  }
 
  function canContiniousFrmCbx (){
     var v_filiere =  document.forms['form_rech_frm_cbx'].elements['filiere'];
     var v_diplome =  document.forms['form_rech_frm_cbx'].elements['diplome'];
     var v_region  =  document.forms['form_rech_frm_cbx'].elements['region'];
      
      if (  v_filiere && v_diplome && v_region ){
          
          if( v_filiere.value != '' || v_diplome.value !='' || v_region.value!=''){
            
             return true;
            
          }else{
               return false;
          }
        
      }else{
      
        return false;
        
      }
  }