function heroUsage(id) {
  pagina = escape(document.location.href);
  ref = escape(document.referrer);
  if((ref == "") || (ref == "undefined")){ ref = "favorieten"; }
  screensize = screen.width + "x" + screen.height;
  screencolor = (navigator.appName.indexOf("Microsoft") > -1) ? screen.colorDepth : screen.pixelDepth;
  document.frames['hero_usage'].location="usage/statistieken_save.php?pagina="+pagina+"&referrer="+ref+"&screensize="+screensize+"&screencolor="+screencolor+"&pages_id="+id+"";
}
var timer;
var direction;
var oldPosition = 0;

function scrollFrame(direction) {
                if(direction == 'left'){
                               timer = setInterval("doScroll('left');",20);
                }
                else if(direction == 'right'){
                               timer = setInterval("doScroll('right');",20);
                }
                else if(direction == 'up'){
                               timer = setInterval("doScroll('up');",20);
                }
                else if(direction == 'down'){
                               timer = setInterval("doScroll('down');",20);
                }
}

function stopScroll(){
				clearInterval(timer);
}

function doScroll(direction){
                if(direction == 'left'){ 
                               document.getElementById('contentDiv').scrollLeft -= 4;
                }
                else if(direction == 'right'){
                               document.getElementById('contentDiv').scrollLeft += 4;
                }
                else if(direction == 'down'){
                               document.getElementById('contentDiv').scrollTop += 4;
                }
                else if(direction == 'up'){
                               document.getElementById('contentDiv').scrollTop -= 4;
                }
}

function scrollFrame2(direction) {
                if(direction == 'left'){
                               timer = setInterval("doScroll2('left');",20);
                }
                else if(direction == 'right'){
                               timer = setInterval("doScroll2('right');",20);
                }
                else if(direction == 'up'){
                               timer = setInterval("doScroll2('up');",20);
                }
                else if(direction == 'down'){
                               timer = setInterval("doScroll2('down');",20);
                }
}

function doScroll2(direction){
                if(direction == 'left'){ 
                               document.getElementById('contentDiv2').scrollLeft -= 4;
                }
                else if(direction == 'right'){
                               document.getElementById('contentDiv2').scrollLeft += 4;
                }
                else if(direction == 'down'){
                               document.getElementById('contentDiv2').scrollTop += 4;
                }
                else if(direction == 'up'){
                               document.getElementById('contentDiv2').scrollTop -= 4;
                }
}