var oldlink = null;
// code to change the active stylesheet
function setactivestylesheet(link, title) {
  var i, a, main;
  for(i=0; (a = document.getelementsbytagname("link")[i]); i++) {
    if(a.getattribute("rel").indexof("style") != -1 && a.getattribute("title")) {
      a.disabled = true;
      if(a.getattribute("title") == title) a.disabled = false;
    }
  }
  if (oldlink) oldlink.style.fontweight = 'normal';
  oldlink = link;
  link.style.fontweight = 'bold';
  return false;
}

function selected(cal, date) {
  cal.sel.value = date; // just update the date in the input field.
  if (cal.dateclicked && (cal.sel.id == "sel1" || cal.sel.id == "sel3"))
   
    cal.callclosehandler();
}

function closehandler(cal) {
  cal.hide();                        // hide the calendar
}

function showcalendar(id, format) {
  var el = document.getelementbyid(id);
  if (calendar != null) {
  
    calendar.hide();                 // so we hide it first.
  } else {
    
    var cal = new calendar(false, null, selected, closehandler);
    calendar = cal;                  // remember it in the global var
    cal.setrange(1900, 2070);        // min/max year allowed.
    cal.create();
  }
  calendar.setdateformat(format);    // set the specified date format
  calendar.parsedate(el.value);      // try to parse the text in field
  calendar.sel = el;                 // inform it what input field we use

  calendar.showatelement(el.nextsibling, "br");        // show the calendar

  return false;
}

var minute = 60 * 1000;
var hour = 60 * minute;
var day = 24 * hour;
var week = 7 * day;


function isdisabled(date) {
  var today = new date();
  return (math.abs(date.gettime() - today.gettime()) / day) > 10;
}

function flatselected(cal, date) {
  var el = document.getelementbyid("preview");
  el.innerhtml = date;
}

function showflatcalendar() {
  var parent = document.getelementbyid("display");

  var cal = new calendar(false, null, flatselected);

  cal.weeknumbers = false;

  cal.setdisabledhandler(isdisabled);
  cal.setdateformat("dd, m d");

  cal.create(parent);
  cal.show();
}