function uploadStart(fileObj) {
	try {
		var progress = new FileProgress(fileObj, this.getSetting("progress_target"));
		progress.SetStatus("Pending...");
		progress.ToggleCancel(true, this);
		document.getElementById("btnCancel1").disabled = false;
	} catch (ex) { 
		this.debugMessage(ex);
	}
}

function uploadProgress(fileObj, bytesLoaded) {
	try {
		var percent = Math.ceil((bytesLoaded / fileObj.size) * 100);
		var progress = new FileProgress(fileObj, this.getSetting("progress_target"));
		progress.SetProgress(percent);
		progress.SetStatus("Uploading...");
	} catch (ex) {
		this.debugMessage(ex);
	}
}

function uploadComplete(fileObj) {
	try {
		var progress = new FileProgress(fileObj, this.getSetting("progress_target"));
		progress.SetComplete();
		progress.SetStatus("Complete.");
		progress.ToggleCancel(false);
	} catch (ex) {
		this.debugMessage(ex);
	}
}

function uploadQueueComplete(fileObj) {
	try {
		document.getElementById("btnCancel1").disabled = true;
	} catch (ex) { this.debugMessage(ex); }
}

function uploadCancel(fileObj) {
	try {
		var progress = new FileProgress(fileObj, this.getSetting("progress_target"));
		progress.SetCancelled();
		progress.SetStatus("Cancelled");
		progress.ToggleCancel(false);

	} catch (ex) {
		this.debugMessage(ex);
	}
}

function uploadError(error_code, fileObj, message) {
	try {
		if (error_code == SWFUpload.ERROR_CODE_QUEUE_LIMIT_EXCEEDED) {
			alert("You have attempted to queue too many files.\n" + (message == 0 ? "You have reached the upload limit." : "You may select " + (message > 1 ? "up to " + message + " files." : "one file.")));
			return;
		}
		var progress = new FileProgress(fileObj, this.getSetting("progress_target"));
		progress.SetError();
		progress.ToggleCancel(false);

		switch(error_code) {
			case SWFUpload.ERROR_CODE_HTTP_ERROR:
				progress.SetStatus("Upload Error");
				this.debugMessage("Error Code: HTTP Error, File name: " + file.name + ", Message: " + message);
				break;
			case SWFUpload.ERROR_CODE_MISSING_UPLOAD_TARGET:
				progress.SetStatus("Configuration Error");
				this.debugMessage("Error Code: No backend file, File name: " + file.name + ", Message: " + message);
				break;
			case SWFUpload.ERROR_CODE_UPLOAD_FAILED:
				progress.SetStatus("Upload Failed.");
				this.debugMessage("Error Code: Upload Failed, File name: " + file.name + ", File size: " + file.size + ", Message: " + message);
				break;
			case SWFUpload.ERROR_CODE_IO_ERROR:
				progress.SetStatus("Server (IO) Error");
				this.debugMessage("Error Code: IO Error, File name: " + file.name + ", Message: " + message);
				break;
			case SWFUpload.ERROR_CODE_SECURITY_ERROR:
				progress.SetStatus("Security Error");
				this.debugMessage("Error Code: Security Error, File name: " + file.name + ", Message: " + message);
				break;
			case SWFUpload.ERROR_CODE_FILE_EXCEEDS_SIZE_LIMIT:
				progress.SetStatus("File is too big.");
				this.debugMessage("Error Code: File too big, File name: " + file.name + ", File size: " + file.size + ", Message: " + message);
				break;
			case SWFUpload.ERROR_CODE_ZERO_BYTE_FILE:
				progress.SetStatus("Cannot upload Zero Byte files.");
				this.debugMessage("Error Code: Zero byte file, File name: " + file.name + ", File size: " + file.size + ", Message: " + message);
				break;
			case SWFUpload.ERROR_CODE_UPLOAD_LIMIT_EXCEEDED:
				progress.SetStatus("Upload limit exceeded.");
				this.debugMessage("Error Code: Upload Limit Exceeded, File name: " + file.name + ", File size: " + file.size + ", Message: " + message);
				break;
			default:
				progress.SetStatus("Unhandled Error");
				this.debugMessage("Error Code: " + error_code + ", File name: " + file.name + ", File size: " + file.size + ", Message: " + message);
				break;
		}
	} catch (ex) {
		this.debugMessage(ex);
	}
}

function FileProgress(fileObj, target_id) {
	this.file_progress_id = fileObj.id;
	this.opacity = 100;
	this.height = 0;
	this.fileProgressWrapper = document.getElementById(this.file_progress_id);
	if (!this.fileProgressWrapper) {
		this.fileProgressWrapper = document.createElement("div");
		this.fileProgressWrapper.className = "progressWrapper";
		this.fileProgressWrapper.id = this.file_progress_id;
		this.fileProgressElement = document.createElement("div");
		this.fileProgressElement.className = "progressContainer";
		
		var progressCancel = document.createElement("a");
		progressCancel.className = "progressCancel";
		progressCancel.href = "#";
		progressCancel.style.visibility = "hidden";
		progressCancel.appendChild(document.createTextNode(" "));

		var progressText = document.createElement("div");
		progressText.className = "progressName";
		progressText.appendChild(document.createTextNode(fileObj.name));

		var progressBar = document.createElement("div");
		progressBar.className = "progressBarInProgress";

		var progressStatus = document.createElement("div");
		progressStatus.className = "progressBarStatus";
		progressStatus.innerHTML = "&nbsp;";

		this.fileProgressElement.appendChild(progressCancel);
		this.fileProgressElement.appendChild(progressText);
		this.fileProgressElement.appendChild(progressStatus);
		this.fileProgressElement.appendChild(progressBar);

		this.fileProgressWrapper.appendChild(this.fileProgressElement);

		document.getElementById(target_id).appendChild(this.fileProgressWrapper);
	} else {
		this.fileProgressElement = this.fileProgressWrapper.firstChild;
	}
	this.height = this.fileProgressWrapper.offsetHeight;
}

FileProgress.prototype.SetProgress = function(percentage) {
	this.fileProgressElement.className = "progressContainer green";
	this.fileProgressElement.childNodes[3].className = "progressBarInProgress";
	this.fileProgressElement.childNodes[3].style.width = percentage + "%";
}

FileProgress.prototype.SetComplete = function() {
	this.fileProgressElement.className = "progressContainer blue";
	this.fileProgressElement.childNodes[3].className = "progressBarComplete";
	this.fileProgressElement.childNodes[3].style.width = "";
	var oSelf = this;
	setTimeout(function() { oSelf.Disappear(); }, 10000);
}

FileProgress.prototype.SetError = function() {
	this.fileProgressElement.className = "progressContainer red";
	this.fileProgressElement.childNodes[3].className = "progressBarError";
	this.fileProgressElement.childNodes[3].style.width = "";
	var oSelf = this;
	setTimeout(function() { oSelf.Disappear(); }, 5000);
}

FileProgress.prototype.SetCancelled = function() {
	this.fileProgressElement.className = "progressContainer";
	this.fileProgressElement.childNodes[3].className = "progressBarError";
	this.fileProgressElement.childNodes[3].style.width = "";
	var oSelf = this;
	setTimeout(function() { oSelf.Disappear(); }, 2000);
}

FileProgress.prototype.SetStatus = function(status) {
	this.fileProgressElement.childNodes[2].innerHTML = status;
}

FileProgress.prototype.ToggleCancel = function(show, upload_obj) {
	this.fileProgressElement.childNodes[0].style.visibility = show ? "visible" : "hidden";
	if (upload_obj) {
		var file_id = this.file_progress_id;
		this.fileProgressElement.childNodes[0].onclick = function() { upload_obj.cancelUpload(file_id); return false; };
	}
}

FileProgress.prototype.Disappear = function() {
	var reduce_opacity_by = 15;
	var reduce_height_by = 4;
	var rate = 30;
	if (this.opacity > 0) {
		this.opacity -= reduce_opacity_by;
		if (this.opacity < 0) this.opacity = 0;
		if (this.fileProgressWrapper.filters) {
			try {
				this.fileProgressWrapper.filters.item("DXImageTransform.Microsoft.Alpha").opacity = this.opacity;
			} catch (e) {
				this.fileProgressWrapper.style.filter = 'progid:DXImageTransform.Microsoft.Alpha(opacity=' + this.opacity + ')';
			}
		} else {
			this.fileProgressWrapper.style.opacity = this.opacity / 100;
		}
	}
	if (this.height > 0) {
		this.height -= reduce_height_by;
		if (this.height < 0) this.height = 0;
		this.fileProgressWrapper.style.height = this.height + "px";
	}
	if (this.height > 0 || this.opacity > 0) {
		var oSelf = this;
		setTimeout(function() { oSelf.Disappear(); }, rate);
	} else {
		this.fileProgressWrapper.style.display = "none";
	}
}