timerID = 0;
var dayarray=new Array("(日)","(月)","(火)","(水)","(木)","(金)","(土)");
var montharray=new Array("1","2","3","4","5","6","7","8","9","10","11","12");

function Realdate()
{
var realdate = new Date();
var day=realdate.getDay();
var month=realdate.getMonth();
var daym=realdate.getDate();
var year=realdate.getFullYear();

var rdate = year+"."+montharray[month]+"."+daym+" "+dayarray[day]+" "+realdate.getHours()+":"+realdate.getMinutes()+":"+realdate.getSeconds();
document.getElementById("clock").innerHTML = rdate;
clearTimeout(timerID);
timerID = setTimeout("Realdate()",1000);
}