run function after DOM loaded

Here is a bit of code that will call the functions runAds() after the DOM has loaded. This is getting a bit advanced, but fun if you want to fiddle. Just be aware that IE will let you document.write stuff to the page at this point, but Firefox will start a new page if you want to document.write anything in. So if you are using this, you'll need to do it by adding iframes in to the source and load the ads in through there:





var alreadyrunflag=0 //flag to indicate whether target function has already been run

if (document.addEventListener)
document.addEventListener("DOMContentLoaded", function(){alreadyrunflag=1; runAds()}, false)
else if (document.all && !window.opera){
document.write('\<script type="text/javascript" id="contentloadtag" defer="defer" src="javascript:void(0)"\>\<\/script\>')
var contentloadtag=document.getElementById("contentloadtag")
contentloadtag.onreadystatechange=function(){
if (this.readyState=="complete"){
alreadyrunflag=1
runAds()
}
}
}

try{
var backupOnload = window.onload;
window.onload=function(){
if((typeof(backupOnload) != "undefined") &&(backupOnload != null)){backupOnload();}
setTimeout("if (!alreadyrunflag) runAds()", 0)
}
}catch(e){}


another one you might like to play with is the defer attribute for calling an external script:

document.write('\<SCR' + 'IPT SRC="' + allAds + '?" type="text/JavaScript" onLoad="runAds();" defer="defer" language="JavaScript"\>');
document.write('\</SCR' + 'IPT\>');

have fun - but remember that we're starting to push the boundaries of what we can do with our adcode here, so test in all browsers and different versions and then make sure you test with all sorts of ads including rich media