function showdate(){
  var welcomestring;
  var  mydate = new Date();
    myhour = mydate.getHours();
    if(myhour<6)             
      welcomestring="凌晨好";
    else if(myhour<9)
      welcomestring="早上好";
    else if(myhour<12)
      welcomestring="上午好";
    else if(myhour<14)
      welcomestring="中午好";
    else if(myhour<17)
      welcomestring="下午好";
    else if(myhour<19)
      welcomestring="傍晚好";
    else
      welcomestring="晚上好";
date=(mydate.getYear())+"年"
               +(mydate.getMonth()+1)+"月"
			   +(mydate.getDate())+"日 "
}

function popwin(url,w,h)
{
 var open=window.open(url,"","width="+w+",height="+h+",resizable=1,toolbar=0,scrollbars=1,menubar=0,left=10,top=10,status=0")
}