var ns4 = (document.layers);
var ie4 = (document.all && !document.getElementById);
var ie5 = (document.all && document.getElementById);
var ns6 = (!document.all && document.getElementById);
	
	
function sLoading() {
	
	if(ns4){
		document.layers['nav2'].visibility = "hide";
	}
	// Explorer 4
	else if(ie4){
		document.all['nav2'].style.visibility = "hidden";
	}
	// W3C - Explorer 5+ and Netscape 6+
	else if(ie5 || ns6){
		document.getElementById('nav2').style.visibility = "hidden";
	}
}
function fLoading() {
	
	if(ns4){
		document.layers['nav3'].visibility = "show";
	}
	// Explorer 4
	else if(ie4){
		document.all['nav3'].style.visibility = "visible";
	}
	// W3C - Explorer 5+ and Netscape 6+
	else if(ie5 || ns6){
		document.getElementById('nav3').style.visibility = "visible";
	}
}

function loadProject(id) {
	 sLoading();
	 new Ajax.Updater('mainAreaInternal', 'rpc-proj.php', {method: 'post', postBody:'content='+ id +''});
	 fLoading();
}