function showMenu(theLayer) {
	var divObj = document.getElementById(theLayer);
	divObj.style.display = "block";
}

function hideMenu(theLayer) {
	var divObj = document.getElementById(theLayer);
	divObj.style.display = "none";
}


function isMouseLeaveOrEnter(e, handler) {
	if (e.type != 'mouseout' && e.type != 'mouseover') return false;
	var reltg = e.relatedTarget ? e.relatedTarget :
	e.type == 'mouseout' ? e.toElement : e.fromElement;
	while (reltg && reltg != handler) reltg = reltg.parentNode;
	return (reltg != handler);
}




var div_id_ifany 
// use div_id_ifany to add a layer name into the rollover function 

var baseImgURL = "images/" 
// sets the image location of the server 

function MakeArray(n) {
      this.length = n
      for (var i = 1; i<=n; i++) {
	      this[i] = new Image()
	      }
      return this
}

normal = new MakeArray(20)
over = new MakeArray(20)

normal[1].src = baseImgURL+"tn_home.gif"
normal[2].src = baseImgURL+"tn_about.gif"
normal[3].src = baseImgURL+"tn_technology.gif"
normal[4].src = baseImgURL+"tn_news.gif"
normal[5].src = baseImgURL+"tn_contact_us.gif"

over[1].src = baseImgURL+"tn_home-over.gif"
over[2].src = baseImgURL+"tn_about-over.gif"
over[3].src = baseImgURL+"tn_technology-over.gif"
over[4].src = baseImgURL+"tn_news-over.gif"
over[5].src = baseImgURL+"tn_contact_us-over.gif"


function msover(num,div_id_ifany) {
	if ((document.layers) && (div_id_ifany != null)) {
		document.layers[div_id_ifany].document.images["nav"+num].src = over[num].src;
	}
	else {
	document.images["nav"+num].src = over[num].src;
	}
}

function msout(num,div_id_ifany) {
	if ((document.layers) && (div_id_ifany != null)) {
		document.layers[div_id_ifany].document.images["nav"+num].src = normal[num].src;
	}
	else {
	document.images["nav"+num].src = normal[num].src;
	}
}