function popup_img(url,size)
{
a = window.open("","",size);
a.document.write("<html>");
a.document.write("<title>",url,"</title>");
a.document.write("<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0>");
a.document.write("<img src=",url,">");
a.document.write("</body></html>");
a.document.close();
return false ;
}