add class to parent in wordpress if page isn't in menu

addOnStateToMenu

function addOnStateToMenu() {
	
	var slugIndex = getSlugIndex();
	var menus = new Array('home','about-us','gsa-schedules', 'services', 'careers', 'case-studies','contact-us');
	var parent = (window.location.pathname).split('/')[slugIndex];
	
	$('#menuList li').each(function(index){
		if ( parent === menus[index]) 
			$(this).addClass('current-menu-parent');
	});
}
function getSlugIndex() {
	if (window.location.hostname.indexOf("localhost") != -1 ){	
		return 2;
	}
	else{
		return 1;
	}
}