function writit(text,id)
{
	if (document.getElementById)
	{
		x = document.getElementById(id);
		x.innerHTML = '';
		x.innerHTML = text;
	}
	else if (document.all)
	{
		x = document.all[id];
		x.innerHTML = text;
	}
	else if (document.layers)
	{
		x = document.layers[id];
		text2 = '<P CLASS="testclass">' + text + '</P>';
		x.document.open();
		x.document.write(text2);
		x.document.close();
	}
}
var state = 'hidden';

function mapshowhide(layer_ref, image) {
	if (state == 'visible') {
		state = 'hidden';
	} else {
		state = 'visible';
	}
	writit('<img src="images/map/' + image + '" alt="" />', "map_desc");
	if (document.all) {
		eval( "document.all." + layer_ref + ".style.visibility = state");
		eval( "document.all.greyPage.style.visibility = state");
	}
	if (document.layers) {
		document.layers[layer_ref].visibility = state;
		document.layers["greyPage"].visibility = state;
	}
	if (document.getElementById && !document.all) {
		documentItem = document.getElementById(layer_ref);
		documentItem.style.visibility = state;

		greyWindow = document.getElementById("greyPage");
		greyWindow.style.visibility = state;
	}
}
function ajax(url, vars, callbackFunction)
{
        var request = window.XMLHttpRequest ? new XMLHttpRequest() : new ActiveXObject("MSXML2.XMLHTTP.3.0");
 
        request.open("POST", url, true);
        request.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); 
 

	request.onreadystatechange = function(){
               	if (request.readyState == 4 && request.status == 200) {
                       	if (request.responseText){
                               	callbackFunction(request.responseText)
                       	}
               	}
	};
        request.send(vars);
}
function changePage(page)
{
	if (document.getElementById("newsarchive")) { 
		if(page == "home"){
			document.getElementById('newsarchive').style.background = 'url("images/newsarchive.gif")';
			document.getElementById('newsarchive').onclick = function() {  location.href='http://www.isotx.com/forums/index.php?board=65.0'; }
			document.getElementById('newsarchive').style.cursor = "pointer";
		} else {
			document.getElementById('newsarchive').style.background = 'url("images/newsarchiveblank.gif")';
			document.getElementById('newsarchive').onclick = "";
			document.getElementById('newsarchive').style.cursor = "default";
		}
	} else {
		if(page == "home"){
			document.getElementById('newsarchivefiller').style.background = 'url("images/newsarchive.gif")';
			document.getElementById('newsarchivefiller').onclick = function() {  location.href='http://www.isotx.com/forums/index.php?board=65.0'; }
			document.getElementById('newsarchivefiller').style.cursor = "pointer";
		} else {
			document.getElementById('newsarchivefiller').style.background = 'url("images/newsarchiveblank.gif")';
			document.getElementById('newsarchivefiller').onclick = "";
			document.getElementById('newsarchivefiller').style.cursor = "default";
		}
	}
	writit("<img src=\"images/loading.gif\" alt=\"\">","contentarea");
	ajax("index.php?getcontent=" + page, "", doChangePage);
}
function doChangePage(content)
{
	writit(content,"contentarea");
}