function onload_f()
{
	var browserName=navigator.appName;
	var browserVer=parseInt(navigator.appVersion);
	if (browserName=="Microsoft Internet Explorer" && browserVer < 7)
	{
		include("scripts/pngfix.js");
	}
	setupNav();
}

function include(filename)
{
	var head = document.getElementsByTagName('head')[0];
	script = document.createElement('script');
	script.src = filename;
	script.type = 'text/javascript';
	head.appendChild(script)
}

function setupNav()
{
	navarr=document.getElementById("nav").getElementsByTagName("a");
	for(i=0; i<navarr.length; i++)
		{
			if(document.URL.indexOf(navarr[i].href)!=-1)
			{
				highlighthover(navarr[i]);
			}
		}
	if(document.URL.indexOf(".html")==-1)
	{
		highlighthover(navarr[0]);
	}
}

function highlighthover(thisimage)
{
	thisimage.parentNode.className="selected";
	thisimage=thisimage.getElementsByTagName("img")[0];
	thisimage.src=thisimage.src.replace(/.gif/, "w.gif");
}