//***动态显示时间***//
function showtime() {
	today = new Date();
	var year = today.getFullYear();
	var month = today.getMonth() + 1;
	var day = today.getDate();
	var hours = today.getHours();
	var minutes = today.getMinutes();
	var seconds = today.getSeconds();
	var timeValue = hours;// ((hours >12) ? hours -12 :hours);
	timeValue += ((minutes < 10) ? ":0" : ":") + minutes + "";
	timeValue += ((seconds < 10) ? ":0" : ":") + seconds + "";
	var timetext = year + "-" + month + "-" + day + " " + timeValue;
	$("#clock").html(timetext); // div的html是now这个字符串
	setTimeout("showtime()", 1000); // 设置过1000毫秒就是1秒，调用showtime方法
} 
window.onload = function () {
	showtime();
};