function ShowHide(nav){
	menu = document.getElementById(nav);    
    menu.style.display == "block"?
    menu.style.display = "none":
    menu.style.display = "block";
}

function ToggleLine(line){      
    guideRule = document.getElementById(line);
    guideRule.style.display == "block"?
    guideRule.style.display = "none":
    guideRule.style.display = "block";
}