var xmlHttp;
var sort, order;

document.onkeyup = KeyCheck;
function KeyCheck(e) {
	prev = myid-1;
	if( prev < 0 ) { prev = ajaxids.length-1; }
	next = myid+1;
	if( next > ajaxids.length-1 ) { next=0; }
	var KeyID = (window.event) ? event.keyCode : e.keyCode;
	switch( KeyID ) {
		case 37:
			myid = prev;
			showPic(prev,sort,order);
			window.location.hash = ajaxids[prev];
			break;
		case 39:
			myid = next;
			showPic(next,sort,order);
			window.location.hash = ajaxids[next];
			break;
	}
}

function GetXmlHttpObject() {
	var xmlHttp=null;
	try {
		xmlHttp=new XMLHttpRequest();
	}
	catch (e) {
		try {
			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e) {
			xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
		}
	}
	return xmlHttp;
}

function showPic(picid,s,o) {
	myid = picid;
	picid = ajaxids[picid];
	sort = s; order = o;
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null) {
		alert ("Your browser does not support AJAX!");
		return;
	} 
	url = "ajaxphoto.php?id="+picid+"&amp;sort="+sort+"&amp;order="+order;
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
	window.location.hash = picid;
}

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