f1=false
function fenster(URL1,b,h)
{
if(f1&&f1.closed==false)

f1.close()
f1=window.open("","","width="+b+",height="+h)
with(f1.document)
{
open()
write("<body topmargin=\"0\" leftmargin=\"0\" marginheight=\"0\" marginwidth=\"0\" onload=\"setTimeout('self.close()',30000)\">")
write("<img src='"+URL1+"'></body>")
close()
}
}
