shown=''
function openimg(url,w,h) {
	if (w==null) {w=900;}
if (h==null) {h=673;}
if( shown=='' || shown.closed) {
	shown=window.open(url,'_blank','scrollbars=no,status=no, high,width='+w+',height='+h+'');
}
else{ 
	//shown.close();
	shown=window.open(url,'_blank','scrollbars=no,status=no, high,width='+w+',height='+h+'');
}
}