function openwin(thename,thewidth,theheight) {
if (thename==null) {
  thename='pic';
}
if (thewidth==null) {
  thewidth='560';
}
if (theheight==null) {
  theheight='500';
}
window.open('',thename,'toolbar=0,location=0,directories=0,status=1,menubar=0,scrollbars=1,resizable=1,width='+thewidth+',height='+theheight);
}