function disp(){

	var now = new Date();

	myYear    = now.getYear();
	myYear4   = (myYear < 2000) ? myYear+1900 : myYear;
	myMonth   = now.getMonth() + 1;
	myDate    = now.getDate();
	myMess   = myYear4 + "年" + myMonth + "月" + myDate + "日";
	var hour = now.getHours(); // 時
	var min = now.getMinutes(); // 分
	var sec = now.getSeconds(); // 秒

	// 数値が1桁の場合、頭に0を付けて2桁で表示する指定
	if(hour < 10) { hour = "0" + hour; }
	if(min < 10) { min = "0" + min; }
	if(sec < 10) { sec = "0" + sec; }

	var watch1 = myMess + "　" + hour + " : " + min + " : " + sec;
	document.form1.field1.value = watch1;

	setTimeout("disp()", 100);

}