//central london preload
london_overview = new Image(); 
london_overview.src = "/images/london_overview.gif";
london_overview_e = new Image(); 
london_overview_e.src = "/images/london_overview_e.gif";
london_overview_ec = new Image(); 
london_overview_ec.src = "/images/london_overview_ec.gif";
london_overview_n = new Image(); 
london_overview_n.src = "/images/london_overview_n.gif";
london_overview_nw = new Image(); 
london_overview_nw.src = "/images/london_overview_nw.gif";
london_overview_se = new Image(); 
london_overview_se.src = "/images/london_overview_se.gif";
london_overview_sw = new Image(); 
london_overview_sw.src = "/images/london_overview_sw.gif";
london_overview_w = new Image(); 
london_overview_w.src = "/images/london_overview_w.gif";
london_overview_wc = new Image(); 
london_overview_wc.src = "/images/london_overview_wc.gif";

//boroughs preload
boroughs_original = new Image(); 
boroughs_original.src = "/images/london_boroughs_original.gif";
boroughs_berks = new Image(); 
boroughs_berks.src = "/images/london_boroughs_berks.gif";
boroughs_br = new Image(); 
boroughs_br.src = "/images/london_boroughs_br.gif";
boroughs_bucks = new Image(); 
boroughs_bucks.src = "/images/london_boroughs_bucks.gif";
boroughs_cr = new Image(); 
boroughs_cr.src = "/images/london_boroughs_cr.gif";
boroughs_da = new Image(); 
boroughs_da.src = "/images/london_boroughs_da.gif";
boroughs_en = new Image(); 
boroughs_en.src = "/images/london_boroughs_en.gif";
boroughs_essex = new Image(); 
boroughs_essex.src = "/images/london_boroughs_essex.gif";
boroughs_ha = new Image(); 
boroughs_ha.src = "/images/london_boroughs_ha.gif";
boroughs_herts = new Image(); 
boroughs_herts.src = "/images/london_boroughs_herts.gif";
boroughs_ig = new Image(); 
boroughs_ig.src = "/images/london_boroughs_ig.gif";
boroughs_kent = new Image(); 
boroughs_kent.src = "/images/london_boroughs_kent.gif";
boroughs_kt = new Image(); 
boroughs_kt.src = "/images/london_boroughs_kt.gif";
boroughs_rm = new Image(); 
boroughs_rm.src = "/images/london_boroughs_rm.gif";
boroughs_sm = new Image(); 
boroughs_sm.src = "/images/london_boroughs_sm.gif";
boroughs_surrey = new Image(); 
boroughs_surrey.src = "/images/london_boroughs_surrey.gif";
boroughs_tw = new Image(); 
boroughs_tw.src = "/images/london_boroughs_tw.gif";
boroughs_ub = new Image(); 
boroughs_ub.src = "/images/london_boroughs_ub.gif";

function clpic(theimage) {
	document.getElementById("centrallondon").src = theimage.src;
}

function cloff() {
	document.getElementById("centrallondon").src = london_overview.src;
}

function lbpic(theimage) {
	document.getElementById("londonboroughs").src = theimage.src;
}

function lboff() {
	document.getElementById("londonboroughs").src = boroughs_original.src;
}