function UpdateRelCond( c , t2 , id_text ){

    obj=document.getElementById( id_text );
//    alert(obj);

    idx=c.selectedIndex;

  //  alert(idx);

    if( idx<=2 ){
      // deshabilitamos t2
      t2.style.visibility="hidden";
      obj.style.visibility="hidden";
    }else{
      t2.style.visibility="visible"
      obj.style.visibility="visible";
    }

 


}



function UpdateCond(  c , t1 ,  t2 , id_text   ){

    obj=document.getElementById( id_text );
    val= parseInt( c.value ) ;

    if(val==0 ){
      t2.style.display="none";
      t1.style.display="none";
      obj.style.display="none";
      return;
    }else if( val>=1 && val<=3 ){
      t1.style.display="";
      t2.style.display="none";
      obj.style.display="none";
    }else{
      t1.style.display="";
      t2.style.display="";
      obj.style.display="";
    }


}