在页面里写个动态本地时间

setInterval(function(){
	var dd = new Date();
	var y = dd.getFullYear();
	var m = dd.getMonth() + 1;
	var d = dd.getDate();
	var h = dd.getHours();
	var mi = dd.getMinutes();
	var s = dd.getSeconds();
	var str = y + "年" + m + "月" + d + "日  " + h + ":" + mi + ":" + s + "  星期" + "日一二三四五六".charAt(dd.getDay());
	document.getElementById("dom").innerHTML = str;
},1000);