Hjælp til onMouseover Tooltip

Jeg har modificeret et tooltip script fra dynamicdrive en smule.
Jeg kunne godt tænke mig, at man både lægge faste tooltips ind i javascriptet (som jeg har gjort i flg.script), og ydermere definere dem i selve html koden, så man altså enten bruger denne model:

<a href="http://www.yahoo.com" onMouseover="tt(event,'Visit Yahoo.com')"; onMouseout="hidett()">Search Engine</a>

eller denne model:

<a href="http://www.yahoo.com" onMouseover="tt(event,1)"; onMouseout="hidett()">Search Engine</a>

Jeg bruger flg. script:

/***********************************************
* Cool DHTML tooltip script- © Dynamic Drive DHTML code library (www.dynamicdrive.com)
* This notice MUST stay intact for legal use
* Visit Dynamic Drive at http://www.dynamicdrive.com/ for full source code
***********************************************/
var messages = new Array();
messages[0] = new Array('Tekst 1',"#BBBBBB");
messages[1] = new Array('Tekst 2',"#DDDDDD");
messages[2] = new Array('Tekst 3',"#FFFFFF");


var offsetxpoint=-60 //Customize x offset of tooltip
var offsetypoint=20 //Customize y offset of tooltip
var ie=document.all
var ns6=document.getElementById && !document.all
var enabletip=false
if (ie||ns6)
var tipobj=document.all? document.all["dhtmltooltip"] : document.getElementById? document.getElementById("dhtmltooltip") : ""

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

function tt(evt,num){
    if (ns6||ie){
    if (messages[num][2]) tipobj.style.width=messages[num][2]+"px";
    else tipobj.style.width="190px";
    if (messages[num][1]) tipobj.style.backgroundColor=messages[num][1];
    else tipobj.style.backgroundColor="#DCDCDE";
    tipobj.innerHTML=messages[num][0];
    enabletip=true;
    return false;
    }
}

function positiontip(e){
if (enabletip){
var curX=(ns6)?e.pageX : event.x+ietruebody().scrollLeft;
var curY=(ns6)?e.pageY : event.y+ietruebody().scrollTop;
//Find out how close the mouse is to the corner of the window
var rightedge=ie&&!window.opera? ietruebody().clientWidth-event.clientX-offsetxpoint : window.innerWidth-e.clientX-offsetxpoint-20
var bottomedge=ie&&!window.opera? ietruebody().clientHeight-event.clientY-offsetypoint : window.innerHeight-e.clientY-offsetypoint-20

var leftedge=(offsetxpoint<0)? offsetxpoint*(-1) : -1000

//if the horizontal distance isn't enough to accomodate the width of the context menu
if (rightedge<tipobj.offsetWidth)
//move the horizontal position of the menu to the left by it's width
tipobj.style.left=ie? ietruebody().scrollLeft+event.clientX-tipobj.offsetWidth+"px" : window.pageXOffset+e.clientX-tipobj.offsetWidth+"px"
else if (curX<leftedge)
tipobj.style.left="5px"
else
//position the horizontal position of the menu where the mouse is positioned
tipobj.style.left=curX+offsetxpoint+"px"

//same concept with the vertical position
if (bottomedge<tipobj.offsetHeight)
tipobj.style.top=ie? ietruebody().scrollTop+event.clientY-tipobj.offsetHeight-offsetypoint+"px" : window.pageYOffset+e.clientY-tipobj.offsetHeight-offsetypoint+"px"
else
tipobj.style.top=curY+offsetypoint+"px"
tipobj.style.visibility="visible"
}
}

function hidett(){
if (ns6||ie){
enabletip=false
tipobj.style.visibility="hidden"
tipobj.style.left="-1000px"
tipobj.style.backgroundColor=''
tipobj.style.width=''
}
}

document.onmousemove=positiontip