/******************************************
* DHTML Ad Box (By Matt Gabbert at http://www.nolag.com)
* Visit http://www.dynamicdrive.com/ for full script
* This notice must stay intact for use
******************************************/

var ns = (document.layers);
var ie = (document.all);
var w3 = (document.getElementById && !ie);
var calunit = ns? "" : "px"

function showAd()
{
    if(!ns && !ie && !w3)
        return;
	if(ie)
	    adDiv = eval('document.all.dhtmlPopup.style');
	else if(ns)
	    adDiv = eval('document.layers["dhtmlPopup"]');
	else if(w3)
	    adDiv = eval('document.getElementById("dhtmlPopup").style');
    if (ie || w3)
        adDiv.visibility = "visible";
    else
        adDiv.visibility = "show";
	if (ie)
	{
	    documentWidth = truebody().offsetWidth/2+truebody().scrollLeft-20;
	    documentHeight = truebody().offsetHeight/2+truebody().scrollTop-20;
	}	
	else if (ns)
	{
	    documentWidth = window.innerWidth/2+window.pageXOffset-20;
	    documentHeight = window.innerHeight/2+window.pageYOffset-20;
	} 
	else if (w3)
	{
	    documentWidth = self.innerWidth/2+window.pageXOffset-20;
	    documentHeight = self.innerHeight/2+window.pageYOffset-20;
	} 
	adDiv.left = documentWidth-200+calunit;
	adDiv.top = documentHeight-200+calunit;
}
function closeAd()
{
    if (ie || w3)
        adDiv.visibility = "hidden";
    else
        adDiv.visibility = "hide";
}
function truebody()
{
    return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}