var nwin=null;
var k=0;
function showimg(img,h,w){
  if(!document.all&&nwin!=null)nwin.close();
  var param=document.all?"height="+h+",width="+w:"innerHeight="+h+",innerWidth="+w;
  var name=document.all&&nwin!=null?"nwin"+k++:"nwin";
  nwin=document.open("image.html?"+img,name,param);
  nwin.focus();
  /*  nwin.document.open();
  nwin.document.write("hello: "+img);
  nwin.document.close();*/
}