var visible=null;
function ShowProducers(where) {
	if(visible!=null) {
		object=document.getElementById(visible).style;
		object.display='none';
		object=document.getElementById(where).style;
		object.display='block';
		visible=where;
	}
		object=document.getElementById(where).style;
		object.display='block';
		visible=where;
}