function bookmark(){
  if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4)) {
  window.external.AddFavorite(document.location.href,document.title);
  } else if (navigator.appName == "Netscape") {
    window.sidebar.addPanel(document.title,document.location.href,"");
  } else {
    alert("Press CTRL-D (Firefox/Netscape) or CTRL-T (Opera) to bookmark");
  }
}


//Home Page Only
function display_div(divid){
    document.getElementById("a1").style.display = 'none';
	document.getElementById("a2").style.display = 'none';
	document.getElementById("a3").style.display = 'none';
	document.getElementById("a4").style.display = 'none';
	document.getElementById("a5").style.display = 'none';
	document.getElementById(divid).style.display = 'block';
}