function ToggleBlock( cl ){
	var obj = document.getElementById('cr_zags');
	if( obj ){
		obj.className = "cr_" + cl + "zag";
	}
	var names = ['news', 'events', 'reds'];
	for( var i=0; i < names.length; i++){
		obj = document.getElementById( 'cr_' + names[i] );
		obj.style.display = names[i] == cl ? "block" : "none";
	}
	return false;
}