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 imageRequest() { 
	if (xmlHttp.readyState==1){				
		document.getElementById("img_load").innerHTML="<span style=\"color: red;\">Loading ...</span>";		
	}
	if (xmlHttp.readyState==4){	

		var newImage = new Image();
		newImage.src = "files/" + xmlHttp.responseText;
	
		document.images['largeImg'].src = newImage.src;
		
		var linkId = document.getElementById('lightBoxLink');
		linkId.href = newImage.src;		
		document.getElementById("img_load").innerHTML = "";
	}		
}
			
function getImage(image_id){
	
	xmlHttp=GetXmlHttpObject();
		if (xmlHttp==null){
			alert ("Your browser does not support AJAX!");
			return;
	}
	
	var url="getImage.php";
	url=url+"?id="+image_id;
	xmlHttp.onreadystatechange=imageRequest;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
}