function initSliding(elID){
   slideBlockWidth=0;
   var srcBlock=document.getElementById(elID);
   srcBlock.style.display="block";
   var els=srcBlock.getElementsByTagName("img");
   var prevWidth=0;
   for(var x=0;x<els.length;x++){
      els[x].style.position="absolute";
      els[x].style.top="0px";
      els[x].style.left=slideBlockWidth+"px";
      slideBlockWidth+=els[x].width;
   }
}

function slideContent(elID){
   var srcBlock=document.getElementById(elID);
   var els=srcBlock.getElementsByTagName("img");
   for(var x=0;x<els.length;x++){
      els[x].style.left=(els[x].style.left.replace("px","")-1)+"px";
      if((parseInt(els[x].style.left.replace("px",""),10)+els[x].width)<0) els[x].style.left=slideBlockWidth-els[x].width+"px";
   }
}