function showhidead(adid, dispval) {
  document.getElementById('adbox'+adid).style.visibility=dispval;
  document.getElementById('adcontent'+adid).style.visibility=dispval;
  document.getElementById('adclose'+adid).style.visibility=dispval;
}
function showsample(iw, ih) {
  var oimg = document.getElementById('samplead');
  oimg.style.width = iw+'px';
  oimg.style.height = ih+'px';  
}