function popUpImageKill()
{
if (typeof(subwin)=='undefined')
return;
if (typeof(subwin.closed)=='undefined')
return;
if (subwin.closed==true)
return;
subwin.close();
}
function popUpImage(targetUrl, title, width, height)
{
popUpImageKill();
if(!width){width=640;}
if(!height){height=480;}
swleft = Math.round((self.screen.width - width)/2);
swtop = Math.round((self.screen.height - height)/3);
subwin=window.open("","","height="+height+",width="+width+", left = "+swleft+", top = "+swtop+", toolbar=no, menubar=no, scrollbars=no, resizable=no, location=no, directories=no, status=no");
subwin.document.write(''+title+'\n');
subwin.document.write('
\n');
subwin.document.write('\n');
subwin.focus();
}