ns4 = (document.layers)? true:false;
ie4 = (document.all)? true:false;
ie5  = (document.getElementById)? true:false;
ns6 = (!document.layers) && (navigator.userAgent.indexOf('Netscape')!=-1)?true:false;	

document.writeln("<input type=\"hidden\" name=\"hlnav\" id=\"hlnav\" value=\"none\">");

function refreshpage() { if (ns6) window.history.go(0); }

function getStyleId(elm){ 
	if (ns4) return eval(elm);
	if (ie4) return eval(elm).style;
	if (ie5||ns6) return document.getElementById(elm).style;
}

function nav_roll(nav, bool){
	if (bool == "over" && document.getElementById("hlnav").value != nav) { getStyleId(nav).visibility="visible"; }
	if (bool == "out" && document.getElementById("hlnav").value != nav) { getStyleId(nav).visibility="hidden"; }
}

function set_section(section){
	reset_nav();
	
	if (section == "home") document.getElementById("hlnav").value = 'Nav0';
	if (section == "aboutus") document.getElementById("hlnav").value = 'Nav1';
	if (section == "personnel") document.getElementById("hlnav").value = 'Nav2';
	if (section == "news") document.getElementById("hlnav").value = 'Nav3';
	if (section == "projects") document.getElementById("hlnav").value = 'Nav4';
	if (section == "empopp") document.getElementById("hlnav").value = 'Nav5';
	if (section == "forsale") document.getElementById("hlnav").value = 'Nav6';
	if (section == "bidopp") document.getElementById("hlnav").value = 'Nav7';
	if (section == "links") document.getElementById("hlnav").value = 'Nav8';
	if (section == "contact") document.getElementById("hlnav").value = 'Nav9';
	if (section == "none") document.getElementById("hlnav").value = "none";
	
	if (document.getElementById("hlnav").value != "none") getStyleId(document.getElementById("hlnav").value).visibility="visible";
}

function reset_nav(){
	i=0;
	nav="Nav0";
	while (document.getElementById(nav)){
		getStyleId(nav).visibility="hidden";
		i++; nav = "Nav" + i.toString();
	}
}