function fileUpload(form, action_url, div_id, callback)
{
	if(!callback) {
		callback = function() {};
	}
	
// Create the iframe...
var iframe = document.createElement("iframe");
iframe.setAttribute("id","upload_iframe");
iframe.setAttribute("name","upload_iframe");
iframe.setAttribute("width","0");
iframe.setAttribute("height","0");
iframe.setAttribute("border","0");
iframe.setAttribute("style","width: 0; height: 0; border: none;");

// Add to document...
form.parentNode.appendChild(iframe);
window.frames['upload_iframe'].name="upload_iframe";

iframeId = document.getElementById("upload_iframe");

// Add event...
var eventHandler = function()  {

if (iframeId.detachEvent)
iframeId.detachEvent("onload", eventHandler);
else
iframeId.removeEventListener("load", eventHandler, false);

// Message from server...
if (iframeId.contentDocument) {
content = iframeId.contentDocument.body.innerHTML;
} else if (iframeId.contentWindow) {
content = iframeId.contentWindow.document.body.innerHTML;
} else if (iframeId.document) {
content = iframeId.document.body.innerHTML;
}

//document.getElementById(div_id).innerHTML = "";
callback(content, div_id);
// Del the iframe...
setTimeout('iframeId.parentNode.removeChild(iframeId)', 250);
}

if (iframeId.addEventListener)
iframeId.addEventListener("load", eventHandler, true);
if (iframeId.attachEvent)
iframeId.attachEvent("onload", eventHandler);

// Set properties of form...
form.setAttribute("target","upload_iframe");
form.setAttribute("action", action_url);
form.setAttribute("method","post");
form.setAttribute("enctype","multipart/form-data");
form.setAttribute("encoding","multipart/form-data");



// Submit the form...
form.submit();

showLoading(div_id);
}

function onUserPicUploadComplete(response, div_id) {
	if(response) {	
		var json = eval("("+response+")");
		
		if(json.error) {
			alert(json.error);
			return;
		}
		
		clearLoading(div_id);
		
		$("#userPic").attr("src", json.src);
		$("#editPhotoGroup").css("display", "block");
	}
}