function f_get_date(object_name){
 var object_value="";
 eval("object_value="+object_name+".value");
if(!f_chkDate(object_value)){
  var v_today=new Date();
  object_value=v_today.getYear()+"-"+(v_today.getMonth()+1)+"-"+(v_today.getDate());
 }
open('calendar.asp?type=date&object='+object_name+'&value='+object_value,'calendar','resizable=yes,toolbar=no,scrollbars=no,directories=no,menubar=no,width=180,height=240');
}
//获取日历时间函数
function f_get_datetime(object_name){
 var object_value="";
 eval("object_value="+object_name+".value");
 open('calendar.asp?type=datetime&object='+object_name+'&value='+object_value,'calendar','resizable=yes,toolbar=no,scrollbars=no,directories=no,menubar=no,width=210,height=270');
}


//检查字符串是否为日期，返回值：false、true
function f_chkDate(datestr)
{
 var lthdatestr
 if (datestr != "")
  lthdatestr= datestr.length ;
 else
  lthdatestr=0;
  
 var tmpy="";
 var tmpm="";
 var tmpd="";
 //var datestr;
 var status;
 status=0;
 if ( lthdatestr== 0)
  return false;

    if(lthdatestr>10)
       return false;
 
 for (i=0;i < lthdatestr;i++)
 { if (datestr.charAt(i)== '-')
  {
   status++;
  }
  if (status>2)
  {
   //alert("Invalid format of date!");
   return false;
  }
  if ((status==0) && (datestr.charAt(i)!='-'))
  {
   tmpy=tmpy+datestr.charAt(i)
  }
  if ((status==1) && (datestr.charAt(i)!='-'))
  {
   tmpm=tmpm+datestr.charAt(i)
  }
  if ((status==2) && (datestr.charAt(i)!='-'))
  {
   tmpd=tmpd+datestr.charAt(i)
  }

 }
 year=new String (tmpy);
 month=new String (tmpm);
 day=new String (tmpd);
 
 //tempdate= new String (year+month+day);
 //alert(tempdate);
 if ((tmpy.length!=4) || (tmpm.length>2) || (tmpd.length>2))
 {
  //alert("Invalid format of date!");
  return false;
 }
 if (!((1<=month) && (12>=month) && (31>=day) && (1<=day)) )
 {
     //alert ("Invalid month or day!");
  return false;
 }
 if (!((year % 4)==0) && (month==2) && (day==29))
 {
  //alert ("This is not a leap year!");
  return false;
 }
 if ((month<=7) && ((month % 2)==0) && (day>=31))
 {
  //alert ("This month is a small month!");
  return false;
 
 }
 if ((month>=8) && ((month % 2)==1) && (day>=31))
 {
  //alert ("This month is a small month!");
  return false;
 }
 if ((month==2) && (day==30))
 {
  //alert("The Febryary never has this day!");
  return false;
 }
 
 return true;
}