function timer() {
var set_y = 2009
var set_m = 9
var set_d = 26

var now = new Date()
var spday= new Date(set_y,set_m-1,set_d)
a = (spday.getTime() - now.getTime())/(24*60*60*1000)
a= Math.ceil(a)

if(a >0) document.write("開催まで あと <strong>",a,"</strong>日")
else if(a==0) document.write("今日から開催")
else if(a <0) document.write("大会 <strong>",-a,"</strong>日目")
}