var sp = "art/spacer.gif";
var bin = [];
for(var i=0; i<18; i++) bin.push(new Image());
bin[0].src = sp;
bin[1].src = "art/nav/property_search_on.gif";
bin[2].src = sp;
bin[3].src = "art/nav/open_houses_on.gif";
bin[4].src = sp;
bin[5].src = "art/nav/company_profile_on.gif";
bin[6].src = sp;
bin[7].src = "art/nav/buyers_on.gif";
bin[8].src = sp;
bin[9].src = "art/nav/sellers_on.gif";
bin[10].src = sp;
bin[11].src = "art/nav/relocation_on.gif";
bin[12].src = sp;
bin[13].src = "art/nav/rentals_on.gif";
bin[14].src = sp;
bin[15].src = "art/nav/mortgage_info_on.gif";
bin[16].src = sp;
bin[17].src = "art/nav/careers_on.gif";
function swapNav(name,number){
	document[name].src = bin[number].src;
}