var r = Math.round(Math.random()*5+1)*1000 + Math.round(Math.random()*5+1)*100 + Math.round(Math.random()*5+1)*10 + Math.round(Math.random()*5+1)*1;
document.write( "<input type=\"hidden\" name=\"key\" value=\"" + r + "\">" );
document.write( "<img border=\"0\" src=\"/cgi-bin/val.cgi?p=1" + r + "\">" );
document.write( "<img border=\"0\" src=\"/cgi-bin/val.cgi?p=2" + r + "\">" );
document.write( "<img border=\"0\" src=\"/cgi-bin/val.cgi?p=3" + r + "\">" );
document.write( "<img border=\"0\" src=\"/cgi-bin/val.cgi?p=4" + r + "\">" );