Reference --> https://www.clothingrepublic.com/lightbox

How do I go about auto loading the lightbox on page load?

Currently, I have to click on the hyperlink to start the pop-up.

Any help rendered is greatly appreciated.

Code:
<html>
<head>
<script type="text/javascript">

/***********************************************
* Dynamic Countdown script-  Dynamic Drive (http://www.dynamicdrive.com)
* This notice MUST stay intact for legal use
* Visit http://www.dynamicdrive.com/ for this script and 100s more.
***********************************************/

function cdtime(container, targetdate){
if (!document.getElementById || !document.getElementById(container)) return
this.container=document.getElementById(container)
this.currentTime=new Date()
this.targetdate=new Date(targetdate)
this.timesup=false
this.updateTime()
}

cdtime.prototype.updateTime=function(){
var thisobj=this
this.currentTime.setSeconds(this.currentTime.getSeconds()+1)
setTimeout(function(){thisobj.updateTime()}, 1000) //update time every second
}

cdtime.prototype.displaycountdown=function(baseunit, functionref){
this.baseunit=baseunit
this.formatresults=functionref
this.showresults()
}

cdtime.prototype.showresults=function(){
var thisobj=this


var timediff=(this.targetdate-this.currentTime)/1000 //difference btw target date and current date, in seconds
if (timediff<0){ //if time is up
this.timesup=true
this.container.innerHTML=this.formatresults()
return
}
var oneMinute=60 //minute unit in seconds
var oneHour=60*60 //hour unit in seconds
var oneDay=60*60*24 //day unit in seconds
var dayfield=Math.floor(timediff/oneDay)
var hourfield=Math.floor((timediff-dayfield*oneDay)/oneHour)
var minutefield=Math.floor((timediff-dayfield*oneDay-hourfield*oneHour)/oneMinute)
var secondfield=Math.floor((timediff-dayfield*oneDay-hourfield*oneHour-minutefield*oneMinute))
if (this.baseunit=="hours"){ //if base unit is hours, set "hourfield" to be topmost level
hourfield=dayfield*24+hourfield
dayfield="n/a"
}
else if (this.baseunit=="minutes"){ //if base unit is minutes, set "minutefield" to be topmost level
minutefield=dayfield*24*60+hourfield*60+minutefield
dayfield=hourfield="n/a"
}
else if (this.baseunit=="seconds"){ //if base unit is seconds, set "secondfield" to be topmost level
var secondfield=timediff
dayfield=hourfield=minutefield="n/a"
}
this.container.innerHTML=this.formatresults(dayfield, hourfield, minutefield, secondfield)
setTimeout(function(){thisobj.showresults()}, 1000) //update results every second
}

/////CUSTOM FORMAT OUTPUT FUNCTIONS BELOW//////////////////////////////

//Create your own custom format function to pass into cdtime.displaycountdown()
//Use arguments[0] to access "Days" left
//Use arguments[1] to access "Hours" left
//Use arguments[2] to access "Minutes" left
//Use arguments[3] to access "Seconds" left

//The values of these arguments may change depending on the "baseunit" parameter of cdtime.displaycountdown()
//For example, if "baseunit" is set to "hours", arguments[0] becomes meaningless and contains "n/a"
//For example, if "baseunit" is set to "minutes", arguments[0] and arguments[1] become meaningless etc


function formatresults(){
if (this.timesup==false){//if target date/time not yet met
var displaystring=arguments[0]+" days "+arguments[1]+" hours "+arguments[2]+" minutes "+arguments[3]+" seconds left until March 23, 2009 18:25:00"
}
else{ //else if target date/time met
var displaystring="********** HEADER OVER HERE **********"
}
return displaystring
}

function formatresults2(){
if (this.timesup==false){ //if target date/time not yet met
var displaystring="<span class='lcdstyle'>"+arguments[0]+" <sup>days</sup> "+arguments[1]+" <sup>hours</sup> "+arguments[2]+" <sup>minutes</sup> "+arguments[3]+" <sup>seconds</sup></span>"
}
else{ //else if target date/time met
var displaystring="" //Don't display any text
alert("Christmas is here!") //Instead, perform a custom alert
}
return displaystring
}
</script>



<style>

/**********************COUNT DOWN TIMER***********************************************/

.lcdstyle{ /*Example CSS to create LCD countdown look*/
background-color:black;
color:white;
font: bold 65px Candara;
padding: 10px;
}

.lcdstyle sup{ /*Example CSS to create LCD countdown look*/
font-size: 80%
}


/**********************COUNT DOWN TIMER***********************************************/

.black_overlay{
display: none;
position: absolute;
top: 0%;
left: 0%;
width: 100%;
height: 100%;
background-color: black;
z-index:1001;
-moz-opacity: 0.8;
opacity:.80;
filter: alpha(opacity=80);
}

.white_content {
display: none;
position: absolute;
top: 15%;
left: 15%;
width: 70%;
height: 65%;
padding: 16px;
background-color: white;
z-index:1002;
overflow: auto;
}

body {line-height: 1;}

ol, ul {list-style: none;}

blockquote, q {quotes: none;}

blockquote:before, blockquote:after,
q:before, q:after {
	content: '';
	content: none;
}

table {
border-collapse: collapse;
border-spacing: 0;
width:100%;
vertical-align: top;
}  

td.tableheader {
color: #ffffff;
background-color:#000000;
border-color:#ababab;
border-style: solid;
text-align:center;
font-family: Tahoma, Geneva, sans-serif;
border-style:solid;
border-width:1px;
font-weight:bold;
line-height:20px;
}

td.tablecontent {
border-color:#ababab;
border-style: solid;
text-align:center;
font-family: Tahoma, Geneva, sans-serif;
border-style:solid;
border-width:1px;
font-size: 15px;
background-color:#ffffff;
}

td.tablecontent2 {
border-color:#ababab;
border-style: solid;
text-align:center;
font-family: Tahoma, Geneva, sans-serif;
border-style:solid;
border-width:1px;
font-size: 15px;
background-color:#e4e4e4;
}

p {text-align:center;}

td.floatright{float:right;}

td.formheader{text-align: center;
font-size: 30px;
font-weight: bold;}
</style>

</head>

	<body>
		<p>This is the main content. To display a lightbox click <a href = "javascript:void(0)" onclick = "document.getElementById('light').style.display='block';document.getElementById('fade').style.display='block'"><u>here</u></a></p>
		<div id="light" class="white_content">
<table>
<tr>

<td class="floatright"><a href = "javascript:void(0)" onclick = "document.getElementById('light').style.display='none';document.getElementById('fade').style.display='none'">Close</a></td>
</tr>
<tr>
<td>
<div id="countdowncontainer"></div>
<br />
<div id="countdowncontainer2"></div>
<script type="text/javascript">
var futuredate=new cdtime("countdowncontainer", "March 23, 2009 18:25:00")
futuredate.displaycountdown("days", formatresults)
var currentyear=new Date().getFullYear()
//dynamically get this Christmas' year value. If Christmas already passed, then year=current year+1
var thischristmasyear=(new Date().getMonth()>=11 && new Date().getDate()>25)? currentyear+1 : currentyear
var christmas=new cdtime("countdowncontainer2", "December 25, "+thischristmasyear+" 0:0:00")
christmas.displaycountdown("days", formatresults2)
</script>
</td>
</tr>
<tr><td><br /><br /><br /><br /><br /><br /><br /><br /></td></tr>
<tr>
<td>
Description Here!!!
</td>
</tr>

</table>
<br>
</div>
		<div id="fade" class="black_overlay"></div>
	</body>
</html>
Regards,
Chris.