一个日期函数，在页面显示

function setdate(){

var date = new Date();

var year = date.getFullYear();

var month = date.getMonth() + 1;

var da = date.getDate();

var day = new Array("星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六")[date.getDay()];

document.getElementByIdx_x("dateshow").innerText=year + "年"+ month + "月"+da+ "日   "+ day;

}