function on(n){	
if (n=='liz')		{s1('_liz');mapt.innerHTML='The Lizard and Land\'s End';}
if (n=='ncorn')		{s1('_ncorn'); s2('_ncorn','_ncorn');mapt.innerHTML='North Cornwall';}
if (n=='scorn')		{s1('_scorn'); s2('_scorn','_scorn'); s3('','_scorn');mapt.innerHTML='South Cornwall';}
if (n=='ndev')		{s2('_ndev',''); s3('_ndev','_ndev');mapt.innerHTML='North Devon';}
if (n=='sdev')		{s3('_sdev','_sdev'); s4('_sdev','_sdev');mapt.innerHTML='South Devon and Dartmoor';}
if (n=='wilt')		{s5('_wilt','_wilt');mapt.innerHTML='Wiltshire';}
if (n=='dors')		{s5('','_dors'); s4('_dors','_dors');mapt.innerHTML='Dorset';}
if (n=='som')		{s4('_som',''); s5('_som',''); s3('_som','');mapt.innerHTML='Somerset';}
}

function off(){	s1('');	s2('','');	s3('','');	s4('','');	s5('',''); mapt.innerHTML='';}
function s1(n1) {	document.images.liz.src = "map/sw_liz" + n1 + ".gif"; }
function s2(n1,n2) {	document.images.ncorn.src = "map/sw_ncorn" + n1 + ".gif";	document.images.scorn.src = "map/sw_scorn" + n2 + ".gif"; }
function s3(n1,n2) {	document.images.ndev.src = "map/sw_ndev" + n1 + ".gif";	document.images.sdev.src = "map/sw_sdev" + n2 + ".gif"; }
function s4(n1,n2) {	document.images.som.src = "map/sw_som" + n1 + ".gif";	document.images.c5.src = "map/sw_c5" + n2 + ".gif"; }
function s5(n1,n2) {	document.images.wilt.src = "map/sw_wilt" + n1 + ".gif";	document.images.dors.src = "map/sw_dors" + n2 + ".gif"; }