js获取实时时间信息、星期几

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	<span>当前时间：</span>
	<span id="time"></span>
	<span id="xq"></span>

	<script type="text/javascript">

	window.onload=function(){
		//1s加载一次
		setInterval("clock()",1000);
	}
		
	function clock () {
		//全局变量d，创建Date对象
		d = new Date();
		//获得日期时间控件
		var spt = document.getElementById("time");
		//格式：2018/2/5  19:19:33
		spt.innerHTML=d.getFullYear()+"年"+(d.getMonth()+1)+"月"+d.getDate()+"日 "+d.getHours()+":"+d.getMinutes()+":"+d.getSeconds();
			
		//获得星期控件
		var spweek = document.getElementById("xq");
		spweek.innerHTML=week();
			
	}

	function week () {
		var weekday = new Array(7)
		weekday[0] = "星期日"
		weekday[1] = "星期一"
		weekday[2] = "星期二"
		weekday[3] = "星期三"
		weekday[4] = "星期四"
		weekday[5] = "星期五"
		weekday[6] = "星期六"
			
		return weekday[d.getDay()];
	}

	</script>

页面显示如下：