cambia contenuto div senza refresh pagina

[Gian76]

Ciao raga,

ho trovato questo script via internet che fa al caso mio, praticamente senza fare il refresh della pagina mi sostituisce il contenuto dei div

l'unico problema e che vorrei che mi facesse vedere subito il contenuto della external.htm come entro nella pagina senza necessità di cliccare il link è possibile?

<script type="text/javascript">

/***********************************************
* Dynamic Ajax Content- © Dynamic Drive DHTML code library ([url]www.dynamicdrive.com[/url])
* This notice MUST stay intact for legal use
* Visit Dynamic Drive at [url]http://www.dynamicdrive.com/[/url] for full source code
***********************************************/

var loadedobjects=""
var rootdomain="http://"+window.location.hostname

function ajaxpage(url, containerid){
var page_request = false
if (window.XMLHttpRequest) // if Mozilla, Safari etc
page_request = new XMLHttpRequest()
else if (window.ActiveXObject){ // if IE
try {
page_request = new ActiveXObject("Msxml2.XMLHTTP")
} 
catch (e){
try{
page_request = new ActiveXObject("Microsoft.XMLHTTP")
}
catch (e){}
}
}
else
return false
page_request.onreadystatechange=function(){
loadpage(page_request, containerid)
}
page_request.open('GET', url, true)
page_request.send(null)
}

function loadpage(page_request, containerid){
if (page_request.readyState == 4 && (page_request.status==200 || window.location.href.indexOf("http")==-1))
document.getElementById(containerid).innerHTML=page_request.responseText
}

function loadobjs(){
if (!document.getElementById)
return
for (i=0; i<arguments.length; i++){
var file=arguments[i]
var fileref=""
if (loadedobjects.indexOf(file)==-1){ //Check to see if this object has not already been added to page before proceeding
if (file.indexOf(".js")!=-1){ //If object is a js file
fileref=document.createElement('script')
fileref.setAttribute("type","text/javascript");
fileref.setAttribute("src", file);
}
else if (file.indexOf(".css")!=-1){ //If object is a css file
fileref=document.createElement("link")
fileref.setAttribute("rel", "stylesheet");
fileref.setAttribute("type", "text/css");
fileref.setAttribute("href", file);
}
}
if (fileref!=""){
document.getElementsByTagName("head").item(0).appendChild(fileref)
loadedobjects+=file+" " //Remember this object as being already added to page
}
}
}

</script>

<style type="text/css">
#leftcolumn{
float:left;
width:150px;
height: 400px;
border: 3px solid black;
padding: 5px;
padding-left: 8px;

}

#leftcolumn a{
padding: 3px 1px;
display: block;
width: 100%;
text-decoration: none;
font-weight: bold;
border-bottom: 1px solid gray;
}

#leftcolumn a:hover{
background-color: #FFFF80;
}

#rightcolumn{
float:left;
width:550px;
min-height: 400px;
border: 3px solid black;
margin-left: 10px;
padding: 5px;
padding-bottom: 8px;
}

* html #rightcolumn{ /*IE only style*/
height: 400px;
}
</style>


    
    
    
    
    <div id="leftcolumn">
[url="javascript:ajaxpage('ajaxfiles/external.htm', 'rightcolumn');"]Pagina1[/url]
[url="javascript:ajaxpage('ajaxfiles/external2.htm', 'rightcolumn');"]Pagina2[/url]
[url="javascript:ajaxpage('ajaxfiles/external3.htm', 'rightcolumn');"]Pagina3[/url]
</div>

<div id="rightcolumn"> clicca sul link a sinistra per vedere il contenuto </div>
<div style="clear: left; margin-bottom: 1em"></div>