var aGlobalRollovers = [
	"nav_home",
	"nav_about",
	"nav_services",
	"nav_recent_projects",
	"nav_client_list",
	"nav_who_we_are",
	"nav_contact_us"
];

var sImgPath = "images/";

for(var i=0; i<aGlobalRollovers.length; i++) {
	eval("var " + aGlobalRollovers[i] + "=new Image()");
	eval(aGlobalRollovers[i] + ".src='" + sImgPath + aGlobalRollovers[i] + ".gif'");
	eval("var " + aGlobalRollovers[i] + "_on=new Image()");
	eval(aGlobalRollovers[i] + "_on.src='" + sImgPath + aGlobalRollovers[i] + "_on" + ".gif'");
}

function swapImage(name, state) {
	document.images[name].src = eval( name + state + ".src" );
}