var isDOM = (document.getElementById ? true : false);
var isIE4 = ((document.all && !isDOM) ? true : false);
var isNS4 = (document.layers ? true : false);
var isDyn = (isDOM || isIE4 || isNS4);

function getTag(id) {
  if (isDOM) return document.getElementById(id);
  if (isIE4) return document.all[id];
  if (isNS4) return document.layers[id];
}

function getTagStyle(id) {
  return (isNS4 ? getTag(id) : getTag(id).style);
}

// array of images 

var imgs = new Array(3); 

imgs[0] = "/images/fr-hover.png"; 
imgs[1] = "/images/en-hover.png"; 
imgs[2] = "/images/pt-hover.png"; 
   
// preload the images 

function preload() { 
   var tmp = null; 
    for (var j = 0; j < imgs.length; j++) { 
      tmp = imgs[j]; 
      imgs[j] = new Image(); 
      imgs[j].src = tmp; 
    } 
} 

void(preload()); 

// nav popup

var current = null;

function down(s) {

       if (navigator.appName != "Microsoft Internet Explorer") { return;}

	if (getTagStyle(s).visibility != 'visible') {
		 if (current) {
		    getTagStyle(current).visibility = 'hidden';
		 }
		 getTagStyle(s).visibility	= 'visible';
		 current = s;
	}
}

function up(s) {

       if (navigator.appName != "Microsoft Internet Explorer") { return;}

        getTagStyle(s).visibility = 'hidden';
	current = null;

}

function upcurrent() {

    if (current) {
	 getTagStyle(current).visibility = 'hidden';
	 current = null;
    }

}