function onload_f()
{
	centernav();
	setupNav();
	external();
}

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

function centernav()
{
	width=0;
	var nav=document.getElementById("nav");
	var navlis=nav.getElementsByTagName("ul")[0].getElementsByTagName("li");
	for(i=0; i<navlis.length; i++)
	{
		if(navlis[i].parentNode.parentNode.id="nav")
		{
			width+=1*navlis[i].clientWidth;
		}
		
	}
	nav.getElementsByTagName("ul")[0].style.width=width+"px";
}

function external()
{
	atags=document.getElementsByTagName("a");
	
	for (ii=0; ii<atags.length; ii++)
	{
		if(atags[ii].title == "External Link")
			atags[ii].target="_blank";
	}
}