/**
*	Object BytesUploaded
*	With a dedicated server file it should know how many bytes are uploading.
*		Look at http://www.devpro.it/upload_progress/ to know more
*
*	@dependencies		LoadVars JavaScritp File: [ http://www.devpro.it/javascript_id_92.html ]
*						dedicated PHP or server file [look at the bottom of this file to view an example]
*	@author				Andrea Giammarchi
*	@site				www.devpro.it
*	@date				2005/09/21
*	@lastmod			2005/09/22 16:00
*	@version			0.1 stable 
*/
	function BytesUploaded(
		phpFile, 	// Contructor needs php or server filename to read informations
		latency 	// Milliseconds for each request during upload, default 1000, min value 50
	) { 
	
		/**
			* Public method
			*	Starts this application, set div or generic html id to write
			*	informations while uploading.
			*
			*	this.start( htmlid:String ):Boolean
			*
			* @Param	String		valid div, span or other page unique id to show information
			* @Return	Boolean		True to submit the form
		*/
		function start(htmlid) {
			__filemonitor.htmlid = htmlid;
			__fileloaderInterval = setTimeout(__readFileSize, 10);
			return true;
		}
	
		/** LIST OF ALL PRIVATE METHODS [ uncommented ] */
		function __fSize(size, dec) {
			if(!dec || dec < 0)
				dec = 2;
			var times = 0;
			var nsize = Number(size);
			var toEval = '';
			var type = Array( 'bytes', 'Kb', 'Mb', 'Gb', 'Tb', 'Zb' );
			while( nsize > 1024 ) {
				nsize = nsize / 1024;
				toEval += ' / 1024';
				times++;
			}
			if( times > 0 )
				eval( 'size = ( size' + toEval + ' );' );
			if(dec > 0) {
				var moltdiv = '(';
				while(dec > 0) {
					moltdiv += '10*';
					dec--;
				}
				moltdiv = moltdiv.substr(0, (moltdiv.length - 1)) + ')';
				eval( 'size = Math.round(size * ' + moltdiv + ') / ' + moltdiv + ';' );
			}
			return size + ' ' + type[times];
		}

		function __readFileSize() {
			__filemonitor.load(phpFile);
		}

		/** DECLARATION OF ALL PUBLIC METHODS */
		this.start = start;	// function to start this application
	
		/** PRIVATE VARIABLES */
		var __fileloaderInterval = 0;
		var __maybesomethingwrong = 0;
		var __filemonitor = new LoadVars();
		__filemonitor.onLoad = function(s) {
			var whatsup = '';
			if(s && this.filesize && this.filesize != 'undefined')
				whatsup = 'Lade Datei (' + __fSize(this.filesize) + ') hoch...';
			else if(this.filesize && this.filesize == 'undefined') {
				whatsup = 'Warte auf den Server ...';
				if(__maybesomethingwrong++ > 10) {
					__fileloaderInterval = 0;
					whatsup = 'Tempor&auml;rer Ordner nicht zug&auml;nglich.';
				}
			} else {
				whatsup = 'Server gibt keine Antwort.';
				__fileloaderInterval = 0;
			}
			document.getElementById(this.htmlid).innerHTML = whatsup;
			delete this.filesize;
			if(__fileloaderInterval != 0)
				__fileloaderInterval = setTimeout(__readFileSize, latency);
		}
		if(!latency || latency < 50)
			latency = 1000;
	}