function catalog_opendrawer (drawernum,totaldrawers) {
  var i=1;
  for (i=1;i<=totaldrawers;i++) {
    var contentdiv = document.getElementById('drawer'+i+'_content');
	if (i == drawernum) {
	  contentdiv.style.display = "block";
	} else {
	  contentdiv.style.display = "none";
	}
  }
}