function trythis()
{
	var screenwidth = screen.width;
	var imagestring = "images/logo800.jpg";
	var logodiv = document.getElementById("logodiv");
	var menuspacer = document.getElementById("menuspacer");
	var bluebarspacer = document.getElementById("bluebarspacer");
	var bluebarmiddle = document.getElementById("bluebarmiddle");
	var menubuttoncounter = 0;
	var divs = document.getElementsByTagName("div");
	for(i = 0; i < divs.length; i++)
	{
		if(divs[i].className == "nav")
			menubuttoncounter++;
	}
	var menubuttonstotalwidth = menubuttoncounter * 140;
	var spacerwidth = (screenwidth - menubuttonstotalwidth) / 2;
	spacerwidth -= ((screenwidth / 5000) * 100); // offset a little to the left of being centred just for style's sake
	if(spacerwidth < 0) spacerwidth = 0;
	if(screenwidth > 800)
	{
		imagestring = "images/logo1024.jpg";
	}
	if(screenwidth > 1024)
	{
		imagestring = "images/logo1280.jpg";
	}
	logodiv.innerHTML = "<img src='" + imagestring + "' alt='' />";
	menuspacer.style.width = spacerwidth + "px";
	bluebarspacer.style.width = (spacerwidth + 48) + "px";
	bluebarmiddle.style.visibility = "visible";
	// spacer width sorted out, now to make the menu buttons visible
	for(i = 0; i < divs.length; i++)
	{
		if(divs[i].className == "nav")
			divs[i].style.visibility = "visible";
	}
}