function change_it(id) {
    if(document.getElementById){
      if(document.getElementById(id).style.visibility == "hidden"){
          document.getElementById(id).style.visibility = "visible";
          document.getElementById(id).style.height = "";
      } else {
	document.getElementById(id).style.visibility = "hidden";
	document.getElementById(id).style.height = "1px";
      }
   }
}