JavaScript - Change Parameters Of Loaded Script After Page Load?

function goVisited(cookiename,img_name,img_src) {
var visited = readCookie(cookiename);
if (visited == "1"){
//alert("visited!");
document[img_name].src=img_src;
}}

<img onload="goVisited('main1','Introduction','img/Yellow.gif');" name="Introduction" border="0" src="img/Green.gif" width="250" height="18">

<script type="text/javascript">
// <![CDATA[
var height=9; // height of the effect in rows - must be an odd number
var speed=66;  // lower is faster
var reveal=99; // between 0 and 100
               // the higher, the faster the word is 'decoded'
var repeat=10;  // if '0' the script does not repeat
               // if set to a number this is the delay until the script repeats
var alink="http://www.noma.nu"; // place to link to
                                      // set to alink="" if not needed

/***************************\
* The Matrix JavaScripted.. *
*(c) 2003-6 mf2fm web-design*
*  http://www.mf2fm.com/rv  *
* DON'T EDIT BELOW THIS BOX *
\***************************/
var timer, table, x, y, columns, ma_txt, ma_cho;
reveal/=100;
var m_coch=new Array();
var m_copo=new Array();
window.onload=function()  This is part im having troubles with. If i do as your toturial tells me i should put Function() down in the body onload command. But it wont work.  { if (document.getElementById) {
  var matrix, tbody, tr, td;
  matrix=document.getElementById("matrix");
  ma_txt=matrix.firstChild.nodeValue;
  ma_txt=" "+ma_txt+" ";
  columns=ma_txt.length;
  while (matrix.childNodes.length) matrix.removeChild(matrix.childNodes[0]);
  table=document.createElement("table");
  table.cellSpacing=0;
  table.style.margin="auto";
  table.style.width="auto";
  table.style.border="none";
  tbody=document.createElement("tbody");
  for (x=0; x<height; x++) {
    tr=document.createElement("tr");
    for (y=0; y<columns; y++) {
      td=document.createElement("td");
      td.className="matrix";
      td.appendChild(document.createTextNode(String.fromCharCode(160)));
      tr.appendChild(td);
    }
    tbody.appendChild(tr);
  }
  table.appendChild(tbody);
  matrix.appendChild(table);
  ma_cho=ma_txt;
  for (x=0; x<columns; x++) {
    m_copo[x]=0;
    ma_cho+=String.fromCharCode(32+Math.floor(Math.random()*94));
  }
  x=0;
  timer=setInterval("mytricks()", speed);
}}

function mytricks() {
  var mtmp, mrow;
  var z=x;
  x=0;
  for (y=0; y<columns; y++) {
    x=x+(m_copo[y]==100);
    mrow=m_copo[y]%100;
    if (mrow && m_copo[y]<100) {
      if (mrow<height+1) {
		mtmp=table.rows[mrow-1].cells[y];
        mtmp.firstChild.nodeValue=m_coch[y];
        mtmp.style.color="#33ff66";
        mtmp.style.fontWeight="bold";
      }
      if (mrow>1 && mrow<height+2) {
		mtmp=table.rows[mrow-2].cells[y];
        mtmp.style.fontWeight="normal";
        mtmp.style.color="#00ff00";
      }
      if (mrow>2) table.rows[mrow-3].cells[y].style.color="#009900";
      if (mrow<Math.floor(height/2)+1) m_copo[y]++;
      else if (mrow==Math.floor(height/2)+1 && m_coch[y]==ma_txt.charAt(y)) zoomer(y);
      else if (mrow<height+2) m_copo[y]++;
      else if (m_copo[y]<100) m_copo[y]=0;
    }
    else if (Math.random()>0.9 && m_copo[y]<100) {
      if (reveal>Math.random() && (z+1)/columns>Math.random()) m_coch[y]=ma_cho.charAt(y);
      else m_coch[y]=ma_cho.charAt(Math.floor(Math.random()*ma_cho.length));
      m_copo[y]++;
    }
  }
  if (x==columns) {
    if (repeat) {
      ma_cho=ma_txt;
      for (x=0; x<columns; x++) {
        m_copo[x]=0;
        ma_cho+=String.fromCharCode(32+Math.floor(Math.random()*94));
      }
    }
    else clearInterval(timer);
  }
}

function zoomer(ycol) {
  var mtmp, mtem, ytmp;
  if (m_copo[ycol]==Math.floor(height/2)+1) {
    for (ytmp=0; ytmp<height; ytmp++) {
	  mtmp=table.rows[ytmp].cells[ycol];
      mtmp.firstChild.nodeValue=m_coch[ycol];
      mtmp.style.color="#33ff66";
      mtmp.style.fontWeight="bold";
      if (alink) {
        mtmp.style.cursor="pointer";
        mtmp.onclick=function() {window.location.href=alink};
      }
    }
    mtmp=ma_cho.indexOf(ma_txt.charAt(ycol));
    m_copo[ycol]+=199;
    setTimeout("zoomer("+ycol+")", speed);
  }
  else if (m_copo[ycol]>200) {
	mtmp=table.rows[m_copo[ycol]-201].cells[ycol];
	mtem=table.rows[200+height-m_copo[ycol]].cells[ycol];
    m_copo[ycol]-=1;
    mtmp.style.fontWeight="normal";
    mtem.style.fontWeight="normal";
    setTimeout("zoomer("+ycol+")", speed);
  }
  else if (m_copo[ycol]==200) m_copo[ycol]=100+Math.floor(height/2);
  if (m_copo[ycol]>100 && m_copo[ycol]<200) {
	mtmp=table.rows[m_copo[ycol]-101].cells[ycol];
    mtmp.firstChild.nodeValue=String.fromCharCode(160);
	mtem=table.rows[100+height-m_copo[ycol]].cells[ycol];
    mtem.firstChild.nodeValue=String.fromCharCode(160);
    m_copo[ycol]-=1;
    setTimeout("zoomer("+ycol+")", speed);
  }
}
// ]]>
</script>

<script type="text/javascript"> 
function showClock()
{
 // create a new Date() object
 var currentTime=new Date();
 var hours=currentTime.getHours();
 var minutes=currentTime.getMinutes();
 var seconds=currentTime.getSeconds();
 var area=currentTime.getTimezoneOffset();
 area=area/60;
 var clock=hours;
 
 // add a zero in front of numbers<10
  if (minutes<10){
   minutes="0" + minutes;
  }
  if (seconds<10){
   seconds="0" + seconds;
  }
 document.getElementById('clock').innerHTML="<table><tr><td width=80 align=center>"+clock+":"+minutes+":"+seconds+"</td>"
 +""
 +"";
 t=setTimeout('showClock()',500);
 // setTimeout calls showClock() function every 500 miliseconds, that means 0.5 seconds
}
</script>

<body onload="showclock()">   this is where the clock load. It works fine. how do i get the other script to load with this.