var xmlHttp

function getFirstIMG(){ 
	xmlHttp = GetXmlHttpObject();
	if(xmlHttp == null){
		alert ("Browser does not support HTTP Request");
		return;
	} 
	var url = "tour/tour_getfirst.php";
	url	= url + "?q=0";
	url = url + "&sid=" + Math.random();
	xmlHttp.onreadystatechange = stateChanged;
	xmlHttp.open("GET", url, true);
	xmlHttp.send(null);
}

function stateChanged(){ 
	if(xmlHttp.readyState == 4 || xmlHttp.readyState == "complete"){ 
		document.getElementById("txtHint").innerHTML = xmlHttp.responseText;
	}
}

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;
}