function getLayer(lyr) {
	if(document.layers) return document.layers[lyr];
	if(document.all) return document.all[lyr];
	if(document.getElementById) return document.getElementById(lyr);
	return null;
}

function getLyrObj(lyr) {
	if(document.layers) return document.layers[lyr];
	if(document.all) return document.all[lyr].style;
	if(document.getElementById) return document.getElementById(lyr).style;
	return null;
}

function toggle(lyr) {
	lyr=getLyrObj(lyr);
	lyr.display=(lyr.display!="none" && lyr.display!="")?"none":"block";
}

function view(id) {
	var interactive=window.open('/interactive/view.php?id='+id,'interactive','width=820,height=640,top=0,left=10,menubar=no,toolbar=no,scrollbars=yes,resizable=yes,location=no,status=no');
	if(interactive.focus)interactive.focus();
}

function credits(id) {
	var more_credits=window.open('/interactive/credits.php?id='+id,'more_credits','width=150,height=400,top=0,left=10,menubar=no,toolbar=no,scrollbars=yes,resizable=yes,location=no,status=no');
	if(more_credits.focus)more_credits.focus();
}
		 
function viewSpot(file) {
	var interactive=window.open('/interactive/view_spot.php?filename='+file,'interactive','width=800,height=600,top=0,left=10,menubar=no,toolbar=no,scrollbars=yes,resizable=yes,location=no,status=no');
	if(interactive.focus)interactive.focus();
}