//http://kawaguchi.wonder-mix.com/2007/05/18-160832.html
function relative_time(time_value) { 
time_values = time_value.split(" "); 
time_value = time_values[1]+" "+time_values[2]+", "+time_values[5]+" "+time_values[3]; 
var parsed_date = Date.parse(time_value); 
var relative_to = (arguments.length > 1) ? arguments[1] : new Date(); 
var delta = parseInt((relative_to.getTime() - parsed_date) / 1000); 
delta = delta + (relative_to.getTimezoneOffset()*60); 
if(delta < 60) { 
return '1分以内'; 
} else if(delta < 120) { 
return '約1分前'; 
} else if(delta < (45*60)) { 
return (parseInt(delta / 60)).toString() + '分前'; 
} else if(delta < (90*60)) { 
return '約1時間前'; 
} else if(delta < (24*60*60)) { 
return '約' + (parseInt(delta / 3600)).toString() + '時間前'; 
} else if(delta < (48*60*60)) { 
return '昨日'; 
} else { 
return (parseInt(delta / 86400)).toString() + '日前'; 
} 
} 
function twitterCallback(obj) { 
var t = document.getElementById('twi'); 
for ( i=0; i<obj.length; i++) { 
t.innerHTML += '<p>' + obj[i].text + '&nbsp;<span>... ' + relative_time(obj[i].created_at) + '</span></p>'; 
} 
}