var maisu = 1;
if(navigator.appName=="Netscape" && navigator.appVersion.charAt(0) ==2) { 
var cako = changeb_akon(maisu)
} else { var cako = Math.ceil(Math.random()*maisu); }
if(cako == 1) document.write('<a href="http://www.yahoo.co.jp/" target="_blank"><a href="http://www.yahoo.co.jp/" target="_blank"><img src="images/hitoduma_06.jpg" alt="�l�È" width=234 height=66 border="0"></a>');