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Thread: Ajax on load

  1. #1
    Join Date
    Dec 2006
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    Default Ajax on load

    Hi im having a bit of trouble getting this script to automaticly load page? It works when clicked but not automotically? any help would be great! thanks

    Code:
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
    <head>
    <title></title>
    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
    
    <script type="text/javascript">
    
    /***********************************************
    * Dynamic Ajax Content-  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 bustcachevar=1 //bust potential caching of external pages after initial request? (1=yes, 0=no)
    var loadedobjects=""
    var rootdomain="http://"+window.location.hostname
    var bustcacheparameter=""
    
    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)
    }
    if (bustcachevar) //if bust caching of external page
    bustcacheparameter=(url.indexOf("?")!=-1)? "&"+new Date().getTime() : "?"+new Date().getTime()
    page_request.open('GET', url+bustcacheparameter, 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>
    
    </head>
    
    <body>
    
    
    <script type="text/javascript">
    ajaxpage('ben.htm', 'rightcolumn')
    </script>
    
    <div id="rightcolum"></div>
    <a href="javascript:ajaxpage('ben.htm', 'contentarea');">test</a> <div id="contentarea"></div>
    
    
    
    </body>
    
    </html>

  2. #2
    Join Date
    Aug 2004
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    Default

    Have you tried just invoking:

    Code:
    <script type="text/javascript">
    
    ajaxpage('ben.htm', 'contentarea')
    
    </script>
    With the above added to the end of your page?

  3. #3
    Join Date
    Dec 2006
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    Default

    You have to place the <script> after the <div> that it is affecting. The browser runs through the code and executes it in the sequence you have it in your HTML. So when it gets to the <script> it tries to load the content into the <div> you specified, but that div doesn't "exist" yet because the browser hasn't gotten to that line.

    I've found it the safest to place your <script> at the end of the document, just before the closing </body> tag.

    Like this:

    <body>

    <div id="rightcolum"></div>
    <a href="javascript:ajaxpage('ben.htm', 'contentarea');">test</a> <div id="contentarea"></div>

    <script type="text/javascript">
    ajaxpage('ben.htm', 'rightcolumn')
    </script>

    </body>

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