var set_y = 2004;
var set_m = 04;
var set_d = 15;

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("<center><strong>あと",a,"日で ****</strong></center>");
else if(a==0) document.write("<center><strong>今日は待望の****です！！！！</strong></center>");
else if(a <0) document.write("<center>解散から",-a,"日経過</center>");