Quick bad preloader guide

import flash.events.Event;

stop(); //stop the flash at the first frame
this.addEventListener (Event.ENTER_FRAME, loading);

function loading (e:Event){
    //important stuff
    var total:Number = this.stage.loaderInfo.bytesTotal;
    var loaded:Number = this.stage.loaderInfo.bytesLoaded;

    //showing progress
    var loadper = Math.round((loaded/total)*100);
    txtLoad.text = loadper + "%"; //REMOVE THIS LINE IF YOU DON'T HAVE A PROGRESS TEXTBOX

    //check if flash is done loading
    if(total <= loaded){
        this.removeEventListener(Event.ENTER_FRAME, loading);
        //Start flash in frame two
        gotoAndStop(2);
    }
}

/*  REMEMBER TO CHANGE LOAD PRIORITIES
*   do this:
*   File > Actionscript settings
*   Set "export classes in frame" to 2
*   then in the library; Right click big assets used in frame 2 i.e. flv files, music etc.
*   go to properties > Actionscript
*   Check Export for actionscript and Export in frame 2
*   NOTE, if you use a sound in the preloader, do not export that to frame 2
*   Also a quick way to test your preloader (if you're using CS6) press ctrl enter twice to simulate download, remember to change the
*   download speed
*   This can be done in View > Download settings
*   Good luck
*/