function layerSetup(id,visibility) {

     if(document.getElementById)
     {
          this.obj = document.getElementById(id).style;
          this.obj.display = visibility;
          return this.obj;
     }
     else if(document.all)
     {
          this.obj = document.all[id].style;
          this.obj.display = visibility;
          return this.obj;
     }
     else if(document.layers)
     {
          this.obj = document.layers[id];
          this.obj.display = visibility;
          return this.obj;
     }
}

function visVisible(param) {
     new layerSetup(param,'block');
}

function visHidden(param){
     new layerSetup(param,'none');
}