function show_diagram($num){
   $elems=elements_with_class(document,'*','hiddendiagram');
   if(!$elems.length){return false;}
	 for($i=0;$i<$elems.length;$i++){
	    $elems[$i].style.display='none';
	 }
	 document.getElementById('hiddendiagram'+$num).style.display='block';
}

function show_region($num){
   $elems=elements_with_class(document,'*','subregion');
   if(!$elems.length){return false;}
	 for($i=0;$i<$elems.length;$i++){
	    $elems[$i].style.display='none';
	 }
	 $all=new Array();
	 $all[1]='Cumbria';
	 $all[2]='Lancashire';
	 $all[3]='Merseyside';
	 $all[4]='Greater Manchester';
	 $all[5]='Cheshire and Warrington';
	 
	 document.getElementById('frontmap').style.display='none';
	 document.getElementById('subregion'+$num).style.display='block';
	 document.getElementById('subregiontitle').firstChild.nodeValue=$all[$num];
}
function hide_region(){
   $elems=elements_with_class(document,'*','subregion');
   if(!$elems.length){return false;}
	 for($i=0;$i<$elems.length;$i++){
	    $elems[$i].style.display='none';
	 }
	 document.getElementById('frontmap').style.display='block';
	 document.getElementById('subregiontitle').firstChild.nodeValue='Sub-Regions';
}