var picPreviewCurrent=-1;
var picChanged=false;
var currentPreviewPic=null;
var picsMoveDirection=-1;
var dPicsContainerHeight=0;
window.onload=InitPreviewPics;
function InitPreviewPics()
{
dPicsContainerHeight=document.getElementById('dPreview').offsetHeight+5;
setInterval('moveCurrPic()',30);
setInterval('changePreviewPic()',4000);
changePreviewPic();
}
function moveCurrPic()
{
if(currentPreviewPic==null||picChanged)
try
{
      picChanged=false; 
 currentPreviewPic=document.getElementById('dPreview').childNodes[picPreviewCurrent];
}
catch(e){return;}
var marg=currentPreviewPic.style.margin;
marg=marg.substr(0,marg.indexOf('px'));
marg=parseInt(marg);
var h=currentPreviewPic.offsetHeight;
if(h+marg<=dPicsContainerHeight)
{
    picsMoveDirection=0;
}
currentPreviewPic.style.margin=(marg+picsMoveDirection)+'px 0px 0px 0px';
}
function changePreviewPic()
{
    var pDiv=document.getElementById('dPreview');
     picPreviewCurrent++;
     picsMoveDirection=-1;
   if(picPreviewCurrent>=pDiv.childNodes.length) 
       picPreviewCurrent=0;     
  for(i=0;i<pDiv.childNodes.length;i++)
  {
    if(!pDiv.childNodes[i])continue;
   if(pDiv.childNodes[i].tagName==null)continue;
   if(pDiv.childNodes[i].tagName==undefined)continue
    if(pDiv.childNodes[i].tagName.toLowerCase()!='a')continue;
        pDiv.childNodes[i].style.margin='0px'; 
    if(i==picPreviewCurrent)
      {
        pDiv.childNodes[i].style.display='block'; 
      }
     else
     {
        pDiv.childNodes[i].style.display='none';      
     }
     picChanged=true;
  }  
};