normal_image = new Image();
	normal_image.src = "images/tutor_on.jpg";
	mouseover_image = new Image();
	mouseover_image.src = "images/ks_03.jpg";

	normal_image1 = new Image();
	normal_image1.src = "images/prod_on.jpg";
	mouseover_image1 = new Image();
	mouseover_image1.src = "images/ks_04.jpg";
	
	normal_image2 = new Image();
	normal_image2.src = "images/price_on.jpg";
	mouseover_image2 = new Image();
	mouseover_image2.src = "images/ks_05.jpg";

	normal_image3 = new Image();
	normal_image3.src = "images/contact_on.jpg";
	mouseover_image3 = new Image();
	mouseover_image3.src = "images/ks_06.jpg";
	
	normal_image4 = new Image();
	normal_image4.src = "images/about_on.jpg";
	mouseover_image4 = new Image();
	mouseover_image4.src = "images/ks_07.jpg";

<!-- repeat the 4 lines above for any subsequent images. -->

	function swap(){
	if (document.images){
	for (var x=0;
	x<swap.arguments.length;
	x+=2) {
	document[swap.arguments[x]].src = eval(swap.arguments[x+1] + ".src");
	}
	}
	}

<!-- ======================= -->

function passA(a){
url='fproducts.html';
location.href=url+'#'+a;
}

function pass2A(a){
url='fmicroelectrodes.html';
location.href=url+'#'+a;
}

function goA(){
loc = parent.location.href.split('?');
anc = loc[loc.length-1];
location.href='#'+anc;
}

<!-- ======================= -->

var disappeardelay=0  //menu disappear speed onMouseout (in miliseconds)
var enableanchorlink=1 //Enable or disable the anchor link when clicked on? (1=e, 0=d)
var hidemenu_onclick=1 //hide menu when user clicks within menu? (1=yes, 0=no)

/////No further editting needed

var ie5=document.all
var ns6=document.getElementById&&!document.all

function getposOffset(what, offsettype){
var totaloffset=(offsettype=="left")? what.offsetLeft : what.offsetTop;
var parentEl=what.offsetParent;
while (parentEl!=null){
totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
parentEl=parentEl.offsetParent;
}
return totaloffset;
}

function showhide(obj, e, visible, hidden){
if (ie5||ns6)
dropmenuobj.style.left=dropmenuobj.style.top=-500
if (e.type=="click" && obj.visibility==hidden || e.type=="mouseover")
obj.visibility=visible
else if (e.type=="click")
obj.visibility=hidden
}

function iecompattest(){
return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}

function clearbrowseredge(obj, whichedge){
var edgeoffset=0
if (whichedge=="rightedge"){
var windowedge=ie5 && !window.opera? iecompattest().scrollLeft+iecompattest().clientWidth-15 : window.pageXOffset+window.innerWidth-15
dropmenuobj.contentmeasure=dropmenuobj.offsetWidth
if (windowedge-dropmenuobj.x < dropmenuobj.contentmeasure)
edgeoffset=dropmenuobj.contentmeasure-obj.offsetWidth
}
else{
var topedge=ie5 && !window.opera? iecompattest().scrollTop : window.pageYOffset
var windowedge=ie5 && !window.opera? iecompattest().scrollTop+iecompattest().clientHeight-15 : window.pageYOffset+window.innerHeight-18
dropmenuobj.contentmeasure=dropmenuobj.offsetHeight
if (windowedge-dropmenuobj.y < dropmenuobj.contentmeasure){ //move up?
edgeoffset=dropmenuobj.contentmeasure+obj.offsetHeight
if ((dropmenuobj.y-topedge)<dropmenuobj.contentmeasure) //up no good either?
edgeoffset=dropmenuobj.y+obj.offsetHeight-topedge
}
}
return edgeoffset
}

function dropdownmenu(obj, e, dropmenuID){
if (window.event) event.cancelBubble=true
else if (e.stopPropagation) e.stopPropagation()
if (typeof dropmenuobj!="undefined") //hide previous menu
dropmenuobj.style.visibility="hidden"
clearhidemenu()
if (ie5||ns6){
obj.onmouseout=delayhidemenu
dropmenuobj=document.getElementById(dropmenuID)
if (hidemenu_onclick) dropmenuobj.onclick=function(){dropmenuobj.style.visibility='hidden'}
dropmenuobj.onmouseover=clearhidemenu
dropmenuobj.onmouseout=ie5? function(){ dynamichide(event)} : function(event){ dynamichide(event)}
showhide(dropmenuobj.style, e, "visible", "hidden")
dropmenuobj.x=getposOffset(obj, "left")
dropmenuobj.y=getposOffset(obj, "top")
dropmenuobj.style.left=dropmenuobj.x-clearbrowseredge(obj, "rightedge")+"px"
dropmenuobj.style.top=dropmenuobj.y-clearbrowseredge(obj, "bottomedge")+obj.offsetHeight+"px"
}
return clickreturnvalue()
}

function clickreturnvalue(){
if ((ie5||ns6) && !enableanchorlink) return false
else return true
}

function contains_ns6(a, b) {
while (b.parentNode)
if ((b = b.parentNode) == a)
return true;
return false;
}

function dynamichide(e){
if (ie5&&!dropmenuobj.contains(e.toElement))
delayhidemenu()
else if (ns6&&e.currentTarget!= e.relatedTarget&& !contains_ns6(e.currentTarget, e.relatedTarget))
delayhidemenu()
}

function delayhidemenu(){
delayhide=setTimeout("dropmenuobj.style.visibility='hidden'",disappeardelay)
swap('tutorial', 'mouseover_image')
swap('prod', 'mouseover_image1')
swap('price', 'mouseover_image2')
swap('about', 'mouseover_image4')
}

function clearhidemenu(){
if (typeof delayhide!="undefined")
clearTimeout(delayhide)
}