function UpdateMenu()
{

	var lr = window.location.search;
	var lrStart = lr.indexOf( "lrcat=" );
	var lrEnd = lr.length;
	
	if( lr.indexOf( "&" ) != -1 )
		lrEnd = lr.indexOf( "&" );

	if( lrStart != -1 )
		lr = lr.substring( lrStart + 6, lrEnd );
	else
		return;
	
	var box = document.getElementById( lr + "Box" );
	
	box.style.display = "Block";
	
}