function setimage(bestand_id){
    document.getElementById('vergroting').src='/viewdbimg.asp?id='+bestand_id+'&maxbreedte=568&maxhoogte=568';
    document.getElementById("vergroting_link").href = "/viewdbimg.asp?id="+bestand_id+"&maxbreedte=800&maxhoogte=600";
    //addthis.toolbox('.addthis_toolbox')
    //addthis.update('share', 'url', 'http://www.lunenburg.nl/viewdbimg.asp?id='+bestand_id);
    //document.getElementById("fb_button").setAttribute('addthis:url',);

    //addthis.update('share', 'url', 'http://www.lunenburg.nl/viewdbimg.asp?id='+bestand_id);

    //document.getElementsByClassName("addthis_button").setAttribute('addthis:url', 'http://www.lunenburg.nl/viewdbimg.asp?id='+bestand_id);

    //var allHTMLTags = document.getElementsByClassName("addthis_button_facebook_like");
    //for (i=0; i<allHTMLTags.length; i++) {
    //  allHTMLTags[i].setAttribute('addthis:url', 'http://www.lunenburg.nl/viewdbimg.asp?id='+bestand_id);
    //}

    //window.addthis.update('share', 'url', 'http://www.lunenburg.nl/viewdbimg.asp?id='+bestand_id);

    //window.addthis.ost = 0;
    //window.addthis.ready();

}
function setDefaultTextFocus(formObj, defText) {
  if (formObj.value == defText) {
    formObj.value = '';
  }
}
function setDefaultTextBlur(formObj, defText) {
  if (formObj.value == '') {
    formObj.value = defText;
  }
}