function changeImage()
    {
        document.getElementById("imgRandom").src=document.getElementById("imgRandom").src+"?";
    }
  	function expand(el)
	{
		childObj = document.getElementById("child" + el);

		if (childObj.style.display == 'none')
		{
			childObj.style.display = 'block';
		}
		else
		{
			childObj.style.display = 'none';
		}
		return;
	}
	function showtime () {

var now = new Date();

var year =now.getFullYear();
var month=now.getMonth();
var day=now.getDate();
var hours = now.getHours();

var minutes = now.getMinutes();

var seconds = now.getSeconds()

var timeValue=""+((hours>12) ? hours-12 :hours)

timeValue+=((minutes<10) ? ":0" : ":")+minutes

timeValue+=((seconds<10) ? ":0" : ":")+seconds

timeValue+=(hours >= 12) ? " PM.":" AM."

window.status =year+ timeValue;
document.getElementById('time').innerHTML="当前时间"+":"+ year+"年"+(month+1)+"月"+day+"日 "+timeValue;

timerID = setTimeout("showtime()",1000);
}