var imageloc = 'http://www.themediadudes.com/freestuff/';
var current_section_name = "nav_introduction";

function navover(what) {
	id = what.id;
	if ( id == current_section_name ) { return false; }
	else { what.src=imageloc+id+'_over.png'; }
}


function navout(what) {
	id = what.id;
	if ( id == current_section_name ) { return false; }
	else { what.src=imageloc+id+'.png'; }
}


function highlightNav(target) {
	
	olditem = document.getElementById(current_section_name);
	olditem.src = imageloc+current_section_name+'.png';
	
	current_section_name = 'nav_'+target.substring(1);
	newitem = document.getElementById(current_section_name);
	newitem.src=imageloc+current_section_name+'_over.png';
}