var menu = new Array();
menu = ["new", "service", "gallery", "staff", "links"];
 
function dropdown(ID) {
  for (i=1; i<=4; i++) {
    var IMG = eval('document.getElementById("' + menu[i] + '_img")');
    var SUB = eval('document.getElementById("' + menu[i] + '_sub")');
    if (ID == menu[i]) {
      if (IMG.src.indexOf('open') > 0) {
        IMG.src = '../corner_closed.gif';
        SUB.style.display = "none";
      } else {
        IMG.src = '../corner_open.gif';
        SUB.style.display = "block";
      }
    } else {
      IMG.src = '../corner_closed.gif';
      SUB.style.display = "none";
    }
  }      
}
window.onload = function() {
  for (i=1; i<=4; i++) {
    document.getElementById("nav").style.visibility="visible";
    document.getElementById(menu[i] + "_sub").style.display = "none";
  }
}