function show_menu(id) {
      var menu = document.getElementById('menu_'+id);
      if(menu.style.display == 'none') {
	menu.style.display = 'block';
//	ChangeImg('img_'+id,'/layout/professional/images/_opened.png');
if(document.images) { eval("document.img_"+id+".src=('/layout/professional/images/_opened.png')"); }
	}
      else {
        menu.style.display = 'none';
//	ChangeImg('img_'+id,'/layout/professional/images/_closed.png');
if(document.images) { eval("document.img_"+id+".src=('/layout/professional/images/_closed.png')"); }
      };
   }
function ChangeImg() {
 if(document.images) {
  eval("document."+ChangeImg.arguments[0]+  ".src=('"+ChangeImg.arguments[1]+"')");
 }
}

function preload() {
  if (document.images) {
    var imgsrc = preload.arguments;
    arr=new Array(imgsrc.length);
    for (var j=0; j<imgsrc.length; j++) {
      arr[j] = new Image;
      arr[j].src = imgsrc[j];
    }
  }
}