function cleanSitemap(){

    if (document.getElementsByTagName) {
        var listItems = document.getElementsByTagName("li");
        
        for (i = 0; i < listItems.length; i++) {

            if (listItems[i].id.indexOf("tx_dropdownsitemap_pi1") != -1) {
            
             var divChildNodes = document.getElementById(listItems[i].id).childNodes;
             
             if (divChildNodes.length == 1){
             
               if (divChildNodes[0].className.indexOf("level_") != -1){

                var olChildNodes = document.getElementById(divChildNodes[0].id).childNodes;

                //if you find no ol element, node has no childs --> clear img
                if (!olChildNodes[2]){
                
                    var curId = divChildNodes[0].id.split("_");
                    
                    var imageEl = document.getElementById("pic_"+curId[1]);
                
                    imageEl.width = 0;
                    
                    imageEl.style.padding = "0 0 0 10px";
                    
                    imageEl.style.cursor ="none";
                
                    imageEl.src = "typo3conf/ext/dropdown_sitemap/pi1/spacer.gif";
                
                }

               }

             }
            }
        }

    }


}