function On(id){
    document.getElementById(id).style.display="block";
    }
          
function Off(id){
    document.getElementById(id).style.display="none";
    }
    
function setClassName(id,classN){
   document.getElementById(id).className=classN;
   }

function displaySort(){
    /*
    if(document.getElementById("sortForm").style.display!="block"){
            Off("filtrForm");
            setClassName("sortLink","Active");
            setClassName("filtrLink","");
            On("sortForm");
            }
     else{
            setClassName("sortLink","");
            Off("sortForm");
            }
    document.getElementById("sortForm").blur();
    */
    }
    
function displayFiltr(){
    /*
    if(document.getElementById("filtrForm").style.display!="block"){
            Off("sortForm");
            setClassName("sortLink","");
            setClassName("filtrLink","Active");
            On("filtrForm");
            }
     else{
            setClassName("filtrLink","");
            Off("filtrForm");
            }
    document.getElementById("filtrForm").blur();
    */
    }