var o = 0;

function incOpacity(i){
document.all.region.style.filter='alpha(opacity='+i+')';
show();
}

function decOpacity(i){
document.all.region.style.filter='alpha(opacity='+i+')';
setTimeout('hide();',5)
}

function show(){
if(o!=100){if((o+=5)>100)o=100;setTimeout('incOpacity('+o+');',1)}
}

function hide(){
if(o!=30){if((o-=5)<30)o=30;setTimeout('decOpacity('+o+');',5)}
}

function rollMap(imgSrc) {
 i = '/img/map/' + imgSrc + '.gif';
 if (document.images) {
	 document['region'].src = i;
	 o = 0; show(); 

 }
}

function preloadImg(i) {
var img = new Image(); 
img.src = i; 
return img;
}

function preloadMap () {
preloadImg('/img/map/yorkshire.gif');
preloadImg('/img/map/scotland.gif');
preloadImg('/img/map/central-south.gif');
preloadImg('/img/map/east-anglia.gif');
preloadImg('/img/map/west-country.gif');
preloadImg('/img/map/wales.gif');
preloadImg('/img/map/south-east.gif');
preloadImg('/img/map/london.gif');
preloadImg('/img/map/hear-england.gif');
preloadImg('/img/map/east-midlands.gif');
preloadImg('/img/map/cumbria.gif');
preloadImg('/img/map/north-west.gif');
preloadImg('/img/map/north-east.gif');
}