function gencd(time){
	var nowtime=new Date();
	var yet;
	var dt=new Array(3);
	var diff=time*1000-nowtime;
	
	dt[0]=diff/Math.abs(diff);
	diff=diff*dt[0];
	dt[1]=Math.floor(diff/86400000);   //1日
	diff-=dt[1]*86400000;
	dt[2]=Math.floor(diff/3600000);	//1時間
	diff-=dt[2]*3600000;
	dt[3]=Math.floor(diff/60000);	  //1分
	diff-=dt[3]*60000;
	dt[4]=Math.floor(diff/1000);	   //1秒
	if(dt[0]<0){
		yet="予定から";
	} else {
		yet="予定まで";
	}
	return(yet+dt[1]+"日と"+dt[2]+"時間"+dt[3]+"分"+dt[4]+"秒");
}

var CountDown = function(time){
	this.time=time;
	this.post=0;
	while(document.getElementById(this.time+"_"+this.post)){
		this.post++;
	}
	document.write("<p id=\""+this.time+"_"+this.post+"\"></p>");
	var self=this;
	this.refresh = function(){
		document.getElementById(self.time+"_"+self.post).innerHTML = gencd(self.time);
	}
	this.refresh();
	setInterval(function(){self.refresh();},1000);
};