function showSM(menu){  

    document.getElementById("sousMenu").style.display ="block";
    switch(menu){
            case "qsn":
            document.getElementById("smQSN").style.display ="block"; 
            document.getElementById("smObjectif").style.display ="none"; 
            document.getElementById("smDouleur").style.display ="none";
            document.getElementById("smLien").style.display ="none"; 
            break;
            
            case "objectif":
             document.getElementById("smQSN").style.display ="none";
            document.getElementById("smObjectif").style.display ="block"; 
            document.getElementById("smDouleur").style.display ="none";
            document.getElementById("smLien").style.display ="none";            
            break;
            
            case "douleur":
            document.getElementById("smQSN").style.display ="none";
            document.getElementById("smObjectif").style.display ="none"; 
            document.getElementById("smDouleur").style.display ="block";
            document.getElementById("smLien").style.display ="none"; 
                break;
            
            case "lien":
            document.getElementById("smQSN").style.display ="none";
            document.getElementById("smObjectif").style.display ="none"; 
            document.getElementById("smDouleur").style.display ="none";
            document.getElementById("smLien").style.display ="block"; ;  
               break;
            
            default:
            document.getElementById("sousMenu").style.display ="none"; 
            document.getElementById("smObjectif").style.display ="none";     
            break;
    }   

}
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