function SWFUpload(settings){
	try{
		document.execCommand('BackgroundImageCache',false,true);
	}
	catch(e){}
	
	this.movieName= "SWFUpload_"+SWFUpload.movieCount++;
	this.movieName += "_"+document.newSwfBuildId;
	this.init(settings);
	this.loadFlash();
		if(this.debug)
			this.debugSettings();
}

SWFUpload.movieCount=0;
SWFUpload.handleErrors=function(errcode,file,msg){
	switch(errcode){
		case-10:	alert("Error Code: HTTP Error, File name: "+file.name+", Message: "+msg);	break;
		case-20:	alert("Error Code: No upload script, File name: "+file.name+", Message: "+msg);	break;
		case-30:	alert("Error Code: IO Error, File name: "+file.name+", Message: "+msg);	break;
		case-40:	alert("Error Code: Security Error, File name: "+file.name+", Message: "+msg);	break;
		case-50:	alert("Error Code: Filesize exceeds limit, File name: "+file.name+", File size: "+file.size+", Message: "+msg);break;
	}
};

SWFUpload.prototype.init=function(settings){
	this.settings=[];
	this.addSetting("debug",settings["debug"],false);
	this.addSetting("target",settings["target"],"");
	this.addSetting("create_ui",settings["create_ui"],false);
	this.addSetting("browse_link_class",settings["browse_link_class"],"SWFBrowseLink");
	this.addSetting("upload_link_class",settings["upload_link_class"],"SWFUploadLink");
	this.addSetting("browse_link_innerhtml",settings["browse_link_innerhtml"],"<span>Browse...</span>");
	this.addSetting("upload_link_innerhtml",settings["upload_link_innerhtml"],"<span>Upload</span>");
	this.addSetting("flash_loaded_callback",settings["flash_loaded_callback"],"SWFUpload.flashLoaded");
	this.addSetting("upload_file_queued_callback",settings["upload_file_queued_callback"],"");
	this.addSetting("upload_file_start_callback",settings["upload_file_start_callback"],"");
	this.addSetting("upload_file_complete_callback",settings["upload_file_complete_callback"],"");
	this.addSetting("upload_queue_complete_callback",settings["upload_queue_complete_callback"],"");
	this.addSetting("upload_progress_callback",settings["upload_progress_callback"],"");
	this.addSetting("upload_dialog_cancel_callback",settings["upload_dialog_cancel_callback"],"");
	this.addSetting("upload_file_error_callback",settings["upload_file_error_callback"],"SWFUpload.handleErrors");
	this.addSetting("upload_file_cancel_callback",settings["upload_file_cancel_callback"],"");
	this.addSetting("upload_queue_cancel_callback",settings["upload_queue_cancel_callback"],"");
	this.addSetting("upload_script",settings["upload_script"],"");
	this.addSetting("auto_upload",settings["auto_upload"],false);
	this.addSetting("allowed_filetypes",settings["allowed_filetypes"],"*.*");
	this.addSetting("allowed_filetypes_description",settings["allowed_filetypes_description"],"All files");
	this.addSetting("allowed_filesize",settings["allowed_filesize"],1024);
	this.addSetting("flash_path",settings["flash_path"],"jscripts/SWFUpload/SWFUpload.swf");
	this.addSetting("flash_target",settings["flash_target"],"");
	this.addSetting("flash_width",settings["flash_width"],"1px");
	this.addSetting("flash_height",settings["flash_height"],"1px");
	this.addSetting("flash_color",settings["flash_color"],"#000000");
	this.debug=this.getSetting("debug");
};

SWFUpload.prototype.loadFlash=function(){
	var html="";
	var sb=new stringBuilder();
	
	if(navigator.plugins&&navigator.mimeTypes&&navigator.mimeTypes.length){
		sb.append('<embed type="application/x-shockwave-flash" src="'+this.getSetting("flash_path")+'" width="'+this.getSetting("flash_width")+'" height="'+this.getSetting("flash_height")+'"');
		sb.append(' id="'+this.movieName+'" name="'+this.movieName+'" ');
		sb.append('bgcolor="'+this.getSetting["flash_color"]+'" quality="high" wmode="transparent" menu="false" flashvars="');
		sb.append(this._getFlashVars());
		sb.append('" />');
	}else{
		sb.append('<object id="'+this.movieName+'" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="'+this.getSetting("flash_width")+'" height="'+this.getSetting("flash_height")+'">');
		sb.append('<param name="movie" value="'+this.getSetting("flash_path")+'" />');
		sb.append('<param name="bgcolor" value="#000000" />');
		sb.append('<param name="quality" value="high" />');
		sb.append('<param name="wmode" value="transparent" />');
		sb.append('<param name="menu" value="false" />');
		sb.append('<param name="flashvars" value="'+this._getFlashVars()+'" />');
		sb.append('</object>');
	}
	
	var container=document.createElement("div");
	container.style.width="0px";
	container.style.height="0px";
	container.style.position="absolute";
	container.style.top="0px";
	container.style.left="0px";
	var target_element=document.getElementsByTagName("body")[0];
	
	if(typeof(target_element)=="undefined"||target_element==null)
		return false;
		
	var html=sb.toString();
	target_element.appendChild(container);
	container.innerHTML=html;
	this.movieElement=document.getElementById(this.movieName);
};


SWFUpload.prototype._getFlashVars=function(){
	var sb=new stringBuilder();
	sb.append("uploadScript="+this.getSetting("upload_script"));
	sb.append("&allowedFiletypesDescription="+this.getSetting("allowed_filetypes_description"));
	sb.append("&flashLoadedCallback="+this.getSetting("flash_loaded_callback"));
	sb.append("&uploadFileQueuedCallback="+this.getSetting("upload_file_queued_callback"));
	sb.append("&uploadFileStartCallback="+this.getSetting("upload_file_start_callback"));
	sb.append("&uploadProgressCallback="+this.getSetting("upload_progress_callback"));
	sb.append("&uploadFileCompleteCallback="+this.getSetting("upload_file_complete_callback"));
	sb.append("&uploadQueueCompleteCallback="+this.getSetting("upload_queue_complete_callback"));
	sb.append("&uploadDialogCancelCallback="+this.getSetting("upload_dialog_cancel_callback"));
	sb.append("&uploadFileErrorCallback="+this.getSetting("upload_file_error_callback"));
	sb.append("&uploadFileCancelCallback="+this.getSetting("upload_file_cancel_callback"));
	sb.append("&uploadQueueCompleteCallback="+this.getSetting("upload_queue_complete_callback"));
	sb.append("&autoUpload="+this.getSetting("auto_upload"));
	sb.append("&allowedFiletypes="+this.getSetting("allowed_filetypes"));
	sb.append("&maximumFilesize="+this.getSetting("allowed_filesize"));
	return sb.toString();
}

SWFUpload.prototype.flashLoaded=function(bool){ 
	this.loadUI();
	
	if(this.debug)
		SWFUpload.debug("Flash called home and is ready.");
};

SWFUpload.prototype.loadUI=function(){
	if(this.getSetting("target")!=""&&this.getSetting("target")!="fileinputs"){
		var instance=this;
		var target=document.getElementById(this.getSetting("target"));
		var browselink=document.createElement("a");
		browselink.className=this.getSetting("browse_link_class");
		browselink.id=this.movieName+"BrowseBtn";
		browselink.href="javascript:void(0);";
		browselink.onclick=function(){
				instance.browse();
				return false;
		}
		browselink.innerHTML=this.getSetting("browse_link_innerhtml");
		target.innerHTML="";
		target.appendChild(browselink);
		
		if(this.getSetting("auto_upload")==false){
			var uploadlink=document.createElement("a");
			uploadlink.className=this.getSetting("upload_link_class");
			uploadlink.id=this.movieName+"UploadBtn";
			uploadlink.href="#";
			uploadlink.onclick=function(){
					instance.upload();
					return false;
			}
			uploadlink.innerHTML=this.getSetting("upload_link_innerhtml");
			target.appendChild(uploadlink);
		}
	}
};

SWFUpload.debug=function(value){
	if(window.console)
		console.log(value);
	else
		alert(value);
}

SWFUpload.prototype.addSetting=function(name,value,default_value){
	return this.settings[name]=(typeof(value)=="undefined"||value==null)?default_value:value;
};

SWFUpload.prototype.getSetting=function(name){
	return(typeof(this.settings[name])=="undefined")?null:this.settings[name];
};

SWFUpload.prototype.browse=function(){
	idval = this.movieElement['id'].substr(this.movieElement['id'].lastIndexOf("_")+1,this.movieElement['id'].length);
	document.currentUploadRow = idval;
	this.movieElement.browse();
};

SWFUpload.prototype.upload=function(){
	this.movieElement.upload();
};

SWFUpload.prototype.cancelFile=function(file_id){
	this.movieElement.cancelFile(file_id);
};

SWFUpload.prototype.cancelQueue=function(){
	this.movieElement.cancelQueue();
};

SWFUpload.prototype.debugSettings=function(){
	var sb=new stringBuilder();
	sb.append("----- DEBUG SETTINGS START ----\n");
	sb.append("ID: "+this.movieElement.id+"\n");
	
	for(var key in this.settings)
		sb.append(key+": "+this.settings[key]+"\n");
	
	sb.append("----- DEBUG SETTINGS END ----\n");
	sb.append("\n");
	
	var res=sb.toString();
	
	SWFUpload.debug(res);
};

function stringBuilder(join){
	this._strings=new Array;
	this._join=(typeof join=="undefined")?"":join;stringBuilder.prototype.append=function(str){
		this._strings.push(str);
	};
	
	stringBuilder.prototype.toString=function(){
		return this._strings.join(this._join);
	};
};