//globals
var ie = (document.all) ? true : false;
var ns = (document.layers) ? true : false;
var dom = (!document.all && document.getElementById) ? true : false;
//nav

preload('nHome_on','images/nav/home_on.gif');
preload('nHome_off','images/nav/home_off.gif');
preload('nListings_on','images/nav/listings_on.gif');
preload('nListings_off','images/nav/listings_off.gif');
preload('nTeam_on','images/nav/team_on.gif');
preload('nTeam_off','images/nav/team_off.gif');
preload('nSearch_on','images/nav/search_on.gif');
preload('nSearch_off','images/nav/search_off.gif');
preload('nResources_on','images/nav/resources_on.gif');
preload('nResources_off','images/nav/resources_off.gif');
preload('nContact_on','images/nav/contact_on.gif');
preload('nContact_off','images/nav/contact_off.gif');



function preload(imgObj,imgSrc) {

	if (document.images) {

		eval(imgObj+' = new Image()')

		eval(imgObj+'.src = "'+imgSrc+'"')

	}

}

function chgImg(imgField,newImg) {

	if (ns) {eval('document.images[imgField].src = '+newImg+'.src')}

	if (ie) {document[imgField].src = eval(newImg+'.src')}

	if (dom) {document.images[imgField].src = eval(newImg+'.src');}

}