function OnInit(initData) {
	initData.name = "ClearViewer";
	initData.version = "1.0";
	initData.url = "https://resource.dopus.com/t/disable-viewer-pane-when-supported-file-not-selected/30685";
	initData.desc = "Clear the viewer pane when changing folders";
	initData.default_enable = true;
	initData.min_version = "12.10";
}

function OnBeforeFolderChange(data) {
	if (!data.initial && data.action != "refresh") {
		var vp = data.tab.lister.viewpane;
		if (vp != 0) {
			var vertOrHoriz = (vp==1) ? "Vert" : "Horiz";
			var cmd = DOpus.Create.Command();
			cmd.SetSourceTab(data.tab);
			cmd.AddLine("Set VIEWPANE=Off");
			cmd.AddLine("Set VIEWPANE=On," + vertOrHoriz);
			cmd.Run();
		}
	}
}