Moze pomoc Javascript hide div

Code:
function getUrlVars() {
    var vars = {};
    var parts = window.location.href.replace(/[?&]+([^=&]+)=([^&]*)/gi,    
    function(m,key,value) {
      vars[key] = value;
    });
    return vars;
  }
  
  
  function showDivFormselect(){
      var fType = getUrlVars()["special"];
                if(var special =="sale-special")
                {
                 document.getElementById(".FormSelect.selectionbox").style.display = 'none';
                }
                else
                {
                function() {
    break;
  }
                }