JS(三)Dateオブジェクトと配列オブジェクト

一、紹介
1.日付オブジェクト:Dateオブジェクトで、日付、時間、曜日、タイムゾーンなどの情報を得ることができます
2.配列オブジェクト:arrayオブジェクト、すなわちphpの配列がjsでjsとして作成される.
二、インスタンスコード

/**
 *   ：    、  、  、   
 */
function myFunction() {
	//   
	document.write(Date() + "<br/>");//      
	document.write(new Date().getTime() + "<br/>");// 1970.01.01       
	var d = new Date();
	d.setFullYear(1980, 12, 18);
	document.write(d + "<br/>");//   1981-12-18      
	document.write(new Date().toUTCString() + "<br/>");//          
	document.write(new Date().getDay() + "<br/>");//     
	//     、 、 
}
/**
 *   =>  
 *     
 */
function myFunction2() {
	/*var weekday = new Array(7);
	weekday[0] = "   ";
	weekday[1] = "   ";
	weekday[2] = "   ";
	weekday[3] = "   ";
	weekday[4] = "   ";
	weekday[5] = "   ";
	weekday[6] = "   ";*/
	var weekday=new Array("   ","   ","   ","   ","   ","   ","   ");
	//  2 JS            

	var x = new Date().getDay();//    =>5
	document.write("   " + weekday[x]);//             
}
/**
 *   =>  
 */
function myFunction3() {
	var d = new Date();
	var h = d.getHours();
	var m = d.getMinutes();
	var s = d.getSeconds();

	h  = checkTime(h);
	m = checkTime(m);
	s = checkTime(s);
	document.getElementById("div1").innerHTML=h+":" + m + ":" +s;
	setTimeout("myFunction3()",1000);//1     ,                  

	function checkTime(x){
		if(x<10){
			x = "0" + x;
		}
		return x;
	}
}