//Código AJAX para o menu Topo da NISSAN
var xmlHttp
var chnSelected= "";
var imgToChange = "";
var menuPositions = new Array(4)
		menuPositions[0] = new Array(2);
		menuPositions[1] = new Array(2);
		menuPositions[2] = new Array(2);
		menuPositions[3] = new Array(2);
			menuPositions[0][0] = "insideNissan_BT";
			menuPositions[0][1] = "http://www.nissan.com.br/images/n_insideNissan_btn_on.gif";
			menuPositions[1][0] = "vehicles_BT";
			menuPositions[1][1] = "http://www.nissan.com.br/images/n_vehicles_btn_on.gif";
			menuPositions[2][0] = "owning_BT";
			menuPositions[2][1] = "http://www.nissan.com.br/images/n_owning_btn_on.gif";
			menuPositions[3][0] = "styleNissan_BT";
			menuPositions[3][1] = "http://www.nissan.com.br/images/n_styleNissan_btn_on.gif";
			
function showHint(str,channel){
	if(channel!=null){
		chnSelected = menuPositions[channel][0];
		imgToChange = menuPositions[channel][1];
	}
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null){
	  	alert ("Seu navegador não suporta AJAX!");
	  	return;
	} 
	var url = str;
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
} 

function stateChanged(){ 
	if(xmlHttp.readyState==4){ 
		document.getElementById("menuPrincipal").innerHTML=xmlHttp.responseText;
		changeMenu();
	}
}

function GetXmlHttpObject(){
	var xmlHttp=null;
		try{// Firefox, Opera 8.0+, Safari
		xmlHttp=new XMLHttpRequest();
		}
		catch (e){// Internet Explorer
			try{xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");}
		catch (e){
			xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
		}
	}
	return xmlHttp;
}

function changeMenu(){
	if(chnSelected!=""){document.getElementById(chnSelected).src=imgToChange;}
}