function WriteDate(id) 

{ 
	var obj=document.getElementById(id);
	if(obj==null)
	{
		alert("没有找到对象"+id);
		return;
	}
	var initTime=obj.value;
	var now="";
	var d=new Date();
	now=d.getYear()+"-"+(d.getMonth()+1)+"-"+d.getDate();
	if(initTime==null||initTime=="")
	{
		var d=new Date();
		initTime=now;
	}
	var str=initTime;
	var ret=false;
    var reg =/^(\d+)-(\d{1,2})-(\d{1,2})$/;    
    var r=str.match(reg);    
    if(r!=null)
	{
		r[2]=r[2]-1; 
		var d=new Date(r[1],r[2],r[3]);    
		if(d.getFullYear()==r[1] && d.getMonth()==r[2] && d.getDate()==r[3])
		{
			ret=true;
		}
	}
	if(ret!=true)
	{
		initTime=now;
	}
	var url="/js/SelDate.htm";
	url+="?"+initTime;
	var timestring = showModalDialog(url, "", "dialogLeft:"+(event.screenX-80)+";dialogTop:"+(event.screenY+10)+";dialogWidth:165px; dialogHeight:205px; edge:raised;help:off;status:off;scroll:off");
	if(timestring!="")
	{
		//alert(timestring);
		//alert(changeDate(timestring));
		//alert(initDate());
		if(changeDate(timestring) < initDate())
		{
			alert('不能选择小于今天的日期');
			document.getElementById(id).value = initDate();
		}
		else
			document.getElementById(id).value = timestring; 
	}
}
function changeDate(date1)
{
	tmp = date1.split('-');
	if(tmp[1]<10)
	{
		tmp[1]="0" + tmp[1];
	}
		if(tmp[2]<10)
	{
		tmp[2]="0" + tmp[2];
	}
	var date2=tmp[0]+"-"+tmp[1]+"-"+tmp[2];
	return date2;
}
function initDate()
{
	var date = new Date();
	var curYear=date.getYear();
	var curMonth=date.getMonth()+1;
	var curDate=date.getDate();	
	if(curDate<10)
	{
		curDate= "0" + curDate
	}
	if(curMonth<10)
	{
		curMonth= "0" + curMonth
	} 
	var strDate=curYear +"-"+ curMonth +"-"+ curDate;
	return strDate;
}