var last_preview='';
var last_preview_img='';
var last_download='';
var last_group='';
var opened_group=new Array;

function preview(id,url,title,img){

   if(last_preview!=''){

     document.getElementById("imgbutton"+last_preview).src = 'img/play'+last_preview_img+'.gif';
     $('#player'+last_preview).toggle('slow');

     document.getElementById("player"+last_preview).innerHTML = '';

   }

   if(id!=last_preview){

     document.getElementById("imgbutton"+id).src = 'img/pause'+img+'.gif';

     last_preview=id;
     last_preview_img=img;

     var so = new SWFObject("player.swf", "id_player"+id, "470", "20", "9", "white");
     so.addParam('allowscriptaccess','always');
     so.addParam('flashvars','autostart=true&file=' + url); 
     so.write("player"+id);

     $('#player'+id).toggle('slow');

   }else{

    last_preview='';

   }

}


function random(){
   return Math.floor(Math.random() * 1000000000);
}