function readSizes(sizeList,targetElement){
numOfSizes = sizeList.firstChild.childNodes.length;
for(i=0; i<numOfSizes;i++){
var width = sizeList.firstChild.childNodes[i].getAttribute("width");
if(width>=minimumWidth){
var imageUrl = sizeList.firstChild.childNodes[i].getAttribute("source");
document.getElementById("imgHolder").style.backgroundImage = "url("+imageUrl+")";
}
}
}


function getCorrectSize(photo_id){
var url = "../scripts/flickr/flickrSlideSizes.cfm?photo_id="+photo_id;

var xmlRequest = getHttpObject();

function getData(url){
xmlRequest.open("GET",url,true);
xmlRequest.onreadystatechange=requestStatus;
xmlRequest.setRequestHeader("Content-Type", "text/xml");
xmlRequest.send(null);
}
function requestStatus(){
if(xmlRequest.readyState == 4){
if(xmlRequest.status == 200){
var xmlResponse = xmlRequest.responseXML.documentElement;
removeWhiteSpace(xmlResponse);
readSizes(xmlResponse);
}
else{
alert("Problem retrieving XML data");
}
}else{
//alert("Processing!");
}
}
if(xmlRequest != null){
var xmlReceived = getData(url);
}
}