TreeParams = {
	CLOSED_MENU_ICON       : "mapa_web/mas.gif",
	OPEN_MENU_ICON         : "mapa_web/menos.gif",
	OPEN_MULTIPLE_MENUS    : false,
	OPEN_WHILE_CLOSING     : true,
	TIME_DELAY             : 40
};
this.setArrow=setButton;

var isTabLayout = true;
function toggleTabs(){

if(!Browser.isSupported() || !window.TabSystem || !(ts = TabSystem.list["body"])) 
	return;

	if(isTabLayout){
		removeTabs(ts);
		isTabLayout = false;
	}
	else {
		undoRemoveTabs(ts);
		isTabLayout = true;
	}
}