function relist(a){
      if(a=="type"){
      	var sortEle = document.getElementById('sortedbytype');
      	sortEle.style.visibility = "visible";
        var sortR = document.getElementById('sortedbyregion');
        sortR.style.visibility = "hidden";
        var sortN = document.getElementById('sortedbyname');
        sortN.style.visibility = "hidden";
      }else if(a=="region"){
      	var sortEle = document.getElementById('sortedbytype');
      	sortEle.style.visibility = "hidden";
        var sortR = document.getElementById('sortedbyregion');
        sortR.style.visibility = "visible";
        var sortN = document.getElementById('sortedbyname');
        sortN.style.visibility = "hidden";
      }else if(a=="name"){
      	var sortEle = document.getElementById('sortedbytype');
      	sortEle.style.visibility = "hidden";
        var sortR = document.getElementById('sortedbyregion');
        sortR.style.visibility = "hidden";
        var sortN = document.getElementById('sortedbyname');
        sortN.style.visibility = "visible";
      
      }
     
}