function ProgressBar(bar,stat){
  this.totalBytes=1;
  this.uploadedBytes=0;
  this.statusEl=stat;
  this.progressEl=bar;
  this.waiting=1;
  this.done=0;
  this.waitTimeout=10;
  var instance=this;
  ajaxCallFunction('ajax.iml?mdl=progress.aj&'+Date(),function(sc,st,rt,rxml){ instance.update(rxml); });
}

ProgressBar.prototype.update=function(rxml){
   var status=getTagValue(rxml,'status');
   if(status=='wait'){
     this.waiting=1;
     this.waitTimeout--;
     this.done=0;
     if(this.statusEl) this.statusEl.innerHTML="Waiting...";
     if(this.progressEl) this.progressEl.style.width="0px";
   }else if(status=='done'){
     this.waiting=0; this.done=1;
     if(this.statusEl) this.statusEl.innerHTML="Done!";
     if(this.progressEl) this.progressEl.style.width="100%";
   }else{
     this.totalBytes=getTagValue(rxml,'total')*1;
     this.uploadedBytes=getTagValue(rxml,'current')*1;
     if(this.totalBytes==0)this.totalBytes=1;
     if(this.uploadedBytes>this.totalBytes) this.uploadedBytes=this.totalBytes;     
     var percent=Number(this.uploadedBytes/this.totalBytes*100).toFixed(1);
     if(this.statusEl){
        var dis=this.totalBytes;
        var suf="Bytes";
        if(dis>1024){
          dis=Number(dis/1024).toFixed(1);
          suf="KB";          
        }
        if(dis>1024){
          dis=Number(dis/1024).toFixed(1);
          suf="MB";          
        }
        this.statusEl.innerHTML=percent+"% of "+dis+" "+suf;
     }
     percent=Number(percent).toFixed();
     if(this.progressEl) this.progressEl.style.width=percent+"%";
   }
   if(!this.done&&this.waitTimeout>0){
       var instance=this;
       ajaxCallFunction('ajax.iml?mdl=progress.aj&status='+status+'&'+Date(),function(sc,st,rt,rxml){ instance.update(rxml); });
   }
  
}