function create_object(){
	var request_type;
	
	try{
		// Opera 8.0+, Firefox, Safari
		request_type = new XMLHttpRequest();
	} catch (e){
		// Internet Explorer Browsers
		try{
			request_type = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try{
				request_type = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e){
				// other
				alert("Your browser broke!");
				return false;
			}
		}
	}
	return request_type;
}

var http_image = create_object();
var nocache_image = 0;

var images_dir = "images/articles/right_images/"

//send request to server to get the right image for this page
function set_image(article_id) {

if (article_id>0){
	nocache_image = Math.random();	
	http_image.open('get', 'assets/images/images.php?article_id='+article_id+'&nocache='+nocache_image);
	http_image.onreadystatechange = set_imageReply;
	http_image.send(null);
}

}


function set_imageReply() {

if (http_image.readyState == 4){

	var response = http_image.responseText;
	//alert(response);
	if(response != ''){
		//set the right image by the recieved image url
		document.getElementById('right_image').innerHTML = "<img alt=\"\" src=\"" + images_dir + response + "\" />";
	}else{
	}
}

}