// Tigra Calendar v4.0.2 (2009-01-12) Database (yyyy-mm-dd)
// http://www.softcomplex.com/products/tigra_calendar/
// Public Domain Software... You're welcome.

// default settins
var A_TCALDEF = {
 'months' : ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'],
 'weekdays' : ['Su', 'Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa'],
 'yearscroll': true, // show year scroller
 'weekstart': 0, // first day of week: 0-Su or 1-Mo
 'centyear'  : 70, // 2 digit years less than 'centyear' are in 20xx, othewise in 19xx.
 'imgpath' : 'libs/css/images/' // directory with calendar images
}
// date parsing function
function f_tcalParseDate (s_date) {

 var re_date = /^\s*(\d{2,4})\-(\d{1,2})\-(\d{1,2})\s*$/;
 if (!re_date.exec(s_date))
  return alert ("Invalid date: '" + s_date + "'.\nAccepted format is yyyy-mm-dd.")
 var n_day = Number(RegExp.$3),
  n_month = Number(RegExp.$2),
  n_year = Number(RegExp.$1);
 
 if (n_year < 100)
  n_year += (n_year < this.a_tpl.centyear ? 2000 : 1900);
 if (n_month < 1 || n_month > 12)
  return alert ("Invalid month value: '" + n_month + "'.\nAllowed range is 01-12.");
 var d_numdays = new Date(n_year, n_month, 0);
 if (n_day > d_numdays.getDate())
  return alert("Invalid day of month value: '" + n_day + "'.\nAllowed range for selected month is 01 - " + d_numdays.getDate() + ".");

 return new Date (n_year, n_month - 1, n_day);
}
// date generating function
function f_tcalGenerDate (d_date) {
 return (
  d_date.getFullYear() + "-"
  + (d_date.getMonth() < 9 ? '0' : '') + (d_date.getMonth() + 1) + "-"
  + (d_date.getDate() < 10 ? '0' : '') + d_date.getDate()
 );
}

// implementation
function tcal (a_cfg, a_tpl) {

 // apply default template if not specified
 if (!a_tpl)
  a_tpl = A_TCALDEF;

 // register in global collections
 if (!window.A_TCALS)
  window.A_TCALS = [];
 if (!window.A_TCALSIDX)
  window.A_TCALSIDX = [];
 
 this.s_id = a_cfg.id ? a_cfg.id : A_TCALS.length;
 window.A_TCALS[this.s_id] = this;
 window.A_TCALSIDX[window.A_TCALSIDX.length] = this;
 
 // assign methods
 this.f_show = f_tcalShow;
 this.f_hide = f_tcalHide;
 this.f_toggle = f_tcalToggle;
 this.f_update = f_tcalUpdate;
 this.f_relDate = f_tcalRelDate;
 this.f_parseDate = f_tcalParseDate;
 this.f_generDate = f_tcalGenerDate;
 
 // create calendar icon
 this.s_iconId = 'tcalico_' + this.s_id;
 this.e_icon = f_getElement(this.s_iconId);
 if (!this.e_icon) {
  document.write('<img src="' + a_tpl.imgpath + 'cal.gif" id="' + this.s_iconId + '" onclick="A_TCALS[\'' + this.s_id + '\'].f_toggle()" class="tcalIcon" alt="Open Calendar" />');
  this.e_icon = f_getElement(this.s_iconId);
 }
 // save received parameters
 this.a_cfg = a_cfg;
 this.a_tpl = a_tpl;
}

function f_tcalShow (d_date) {

 // find input field
 if (!this.a_cfg.controlname)
  throw("TC: control name is not specified");
 if (this.a_cfg.formname) {
  var e_form = document.forms[this.a_cfg.formname];
  if (!e_form)
   throw("TC: form '" + this.a_cfg.formname + "' can not be found");
  this.e_input = e_form.elements[this.a_cfg.controlname];
 }
 else
  this.e_input = f_getElement(this.a_cfg.controlname);

 if (!this.e_input || !this.e_input.tagName || this.e_input.tagName != 'INPUT')
  throw("TC: element '" + this.a_cfg.controlname + "' does not exist in "
   + (this.a_cfg.formname ? "form '" + this.a_cfg.controlname + "'" : 'this document'));

 // dynamically create HTML elements if needed
 this.e_div = f_getElement('tcal');
 if (!this.e_div) {
  this.e_div = document.createElement("DIV");
  this.e_div.id = 'tcal';
  document.body.appendChild(this.e_div);
 }
 this.e_shade = f_getElement('tcalShade');
 if (!this.e_shade) {
  this.e_shade = document.createElement("DIV");
  this.e_shade.id = 'tcalShade';
  document.body.appendChild(this.e_shade);
 }
 this.e_iframe =  f_getElement('tcalIF')
 if (b_ieFix && !this.e_iframe) {
  this.e_iframe = document.createElement("IFRAME");
  this.e_iframe.style.filter = 'alpha(opacity=0)';
  this.e_iframe.id = 'tcalIF';
  this.e_iframe.src = this.a_tpl.imgpath + 'pixel.gif';
  document.body.appendChild(this.e_iframe);
 }
 
 // hide all calendars
 f_tcalHideAll();

 // generate HTML and show calendar
 this.e_icon = f_getElement(this.s_iconId);
 if (!this.f_update())
  return;

 this.e_div.style.visibility = 'visible';
 this.e_shade.style.visibility = 'visible';
 if (this.e_iframe)
  this.e_iframe.style.visibility = 'visible';

 // change icon and status
 this.e_icon.src = this.a_tpl.imgpath + 'no_cal.gif';
 this.e_icon.title = 'Close Calendar';
 this.b_visible = true;
}

function f_tcalHide (n_date) {
 if (n_date)
  this.e_input.value = this.f_generDate(new Date(n_date));

 // no action if not visible
 if (!this.b_visible)
  return;

 // hide elements
 if (this.e_iframe)
  this.e_iframe.style.visibility = 'hidden';
 if (this.e_shade)
  this.e_shade.style.visibility = 'hidden';
 this.e_div.style.visibility = 'hidden';
 
 // change icon and status
 this.e_icon = f_getElement(this.s_iconId);
 this.e_icon.src = this.a_tpl.imgpath + 'cal.gif';
 this.e_icon.title = 'Open Calendar';
 this.b_visible = false;
}

function f_tcalToggle () {
 return this.b_visible ? this.f_hide() : this.f_show();
}

function f_tcalUpdate (d_date) {
 
 var d_today = this.a_cfg.today ? this.f_parseDate(this.a_cfg.today) : f_tcalResetTime(new Date());
 var d_selected = this.e_input.value == ''
  ? (this.a_cfg.selected ? this.f_parseDate(this.a_cfg.selected) : d_today)
  : this.f_parseDate(this.e_input.value);

 // figure out date to display
 if (!d_date)
  // selected by default
  d_date = d_selected;
 else if (typeof(d_date) == 'number')
  // get from number
  d_date = f_tcalResetTime(new Date(d_date));
 else if (typeof(d_date) == 'string')
  // parse from string
  this.f_parseDate(d_date);
  
 if (!d_date) return false;

 // first date to display
 var d_firstday = new Date(d_date);
 d_firstday.setDate(1);
 d_firstday.setDate(1 - (7 + d_firstday.getDay() - this.a_tpl.weekstart) % 7);
 
 var a_class, s_html = '<table class="ctrl"><tbody><tr>'
  + (this.a_tpl.yearscroll ? '<td' + this.f_relDate(d_date, -1, 'y') + ' title="Previous Year"><img src="' + this.a_tpl.imgpath + 'prev_year.gif" /></td>' : '')
  + '<td' + this.f_relDate(d_date, -1) + ' title="Previous Month"><img src="' + this.a_tpl.imgpath + 'prev_mon.gif" /></td><th>'
  + this.a_tpl.months[d_date.getMonth()] + ' ' + d_date.getFullYear()
   + '</th><td' + this.f_relDate(d_date, 1) + ' title="Next Month"><img src="' + this.a_tpl.imgpath + 'next_mon.gif" /></td>'
  + (this.a_tpl.yearscroll ? '<td' + this.f_relDate(d_date, 1, 'y') + ' title="Next Year"><img src="' + this.a_tpl.imgpath + 'next_year.gif" /></td></td>' : '')
  + '</tr></tbody></table><table><tbody><tr class="wd">';

 // print weekdays titles
 for (var i = 0; i < 7; i++)
  s_html += '<th>' + this.a_tpl.weekdays[(this.a_tpl.weekstart + i) % 7] + '</th>';
 s_html += '</tr>' ;

 // print calendar table
 var n_date, n_month, d_current = new Date(d_firstday);
 while (d_current.getMonth() == d_date.getMonth() ||
  d_current.getMonth() == d_firstday.getMonth()) {
 
  // print row heder
  s_html +='<tr>';
  for (var n_wday = 0; n_wday < 7; n_wday++) {

   a_class = [];
   n_date = d_current.getDate();
   n_month = d_current.getMonth();

   // other month
   if (d_current.getMonth() != d_date.getMonth())
    a_class[a_class.length] = 'othermonth';
   // weekend
   if (d_current.getDay() == 0 || d_current.getDay() == 6)
    a_class[a_class.length] = 'weekend';
   // today
   if (d_current.valueOf() == d_today.valueOf())
    a_class[a_class.length] = 'today';
   // selected
   if (d_current.valueOf() == d_selected.valueOf())
    a_class[a_class.length] = 'selected';

   s_html += '<td onclick="A_TCALS[\'' + this.s_id + '\'].f_hide(' + d_current.valueOf() + ')"' + (a_class.length ? ' class="' + a_class.join(' ') + '">' : '>') + n_date + '</td>'

   d_current.setDate(++n_date);
   while (d_current.getDate() != n_date && d_current.getMonth() == n_month) {
    alert(n_date + "\n" + d_current + "\n" + new Date());
    d_current.setHours(d_current.getHours + 1);
    d_current = f_tcalResetTime(d_current);
   }
  }
  // print row footer
  s_html +='</tr>';
 }
 s_html +='</tbody></table>';
 
 // update HTML, positions and sizes
 this.e_div.innerHTML = s_html;

 var n_width  = this.e_div.offsetWidth;
 var n_height = this.e_div.offsetHeight;
 var n_top  = f_getPosition (this.e_icon, 'Top') + this.e_icon.offsetHeight;
 var n_left = f_getPosition (this.e_icon, 'Left') - n_width + this.e_icon.offsetWidth;
 if (n_left < 0) n_left = 0;
 
 this.e_div.style.left = n_left + 'px';
 this.e_div.style.top  = n_top + 'px';

 this.e_shade.style.width = (n_width + 8) + 'px';
 this.e_shade.style.left = (n_left - 1) + 'px';
 this.e_shade.style.top = (n_top - 1) + 'px';
 this.e_shade.innerHTML = b_ieFix
  ? '<table><tbody><tr><td rowspan="2" colspan="2" width="6"><img src="' + this.a_tpl.imgpath + 'pixel.gif"></td><td width="7" height="7" style="filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src=\'' + this.a_tpl.imgpath + 'shade_tr.png\', sizingMethod=\'scale\');"><img src="' + this.a_tpl.imgpath + 'pixel.gif"></td></tr><tr><td height="' + (n_height - 7) + '" style="filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src=\'' + this.a_tpl.imgpath + 'shade_mr.png\', sizingMethod=\'scale\');"><img src="' + this.a_tpl.imgpath + 'pixel.gif"></td></tr><tr><td width="7" style="filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src=\'' + this.a_tpl.imgpath + 'shade_bl.png\', sizingMethod=\'scale\');"><img src="' + this.a_tpl.imgpath + 'pixel.gif"></td><td style="filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src=\'' + this.a_tpl.imgpath + 'shade_bm.png\', sizingMethod=\'scale\');" height="7" align="left"><img src="' + this.a_tpl.imgpath + 'pixel.gif"></td><td style="filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src=\'' + this.a_tpl.imgpath + 'shade_br.png\', sizingMethod=\'scale\');"><img src="' + this.a_tpl.imgpath + 'pixel.gif"></td></tr><tbody></table>'
  : '<table><tbody><tr><td rowspan="2" width="6"><img src="' + this.a_tpl.imgpath + 'pixel.gif"></td><td rowspan="2"><img src="' + this.a_tpl.imgpath + 'pixel.gif"></td><td width="7" height="7"><img src="' + this.a_tpl.imgpath + 'shade_tr.png"></td></tr><tr><td background="' + this.a_tpl.imgpath + 'shade_mr.png" height="' + (n_height - 7) + '"><img src="' + this.a_tpl.imgpath + 'pixel.gif"></td></tr><tr><td><img src="' + this.a_tpl.imgpath + 'shade_bl.png"></td><td background="' + this.a_tpl.imgpath + 'shade_bm.png" height="7" align="left"><img src="' + this.a_tpl.imgpath + 'pixel.gif"></td><td><img src="' + this.a_tpl.imgpath + 'shade_br.png"></td></tr><tbody></table>';
 
 if (this.e_iframe) {
  this.e_iframe.style.left = n_left + 'px';
  this.e_iframe.style.top  = n_top + 'px';
  this.e_iframe.style.width = (n_width + 6) + 'px';
  this.e_iframe.style.height = (n_height + 6) +'px';
 }
 return true;
}

function f_getPosition (e_elemRef, s_coord) {
 var n_pos = 0, n_offset,
  e_elem = e_elemRef;

 while (e_elem) {
  n_offset = e_elem["offset" + s_coord];
  n_pos += n_offset;
  e_elem = e_elem.offsetParent;
 }
 // margin correction in some browsers
 if (b_ieMac)
  n_pos += parseInt(document.body[s_coord.toLowerCase() + 'Margin']);
 else if (b_safari)
  n_pos -= n_offset;
 
 e_elem = e_elemRef;
 while (e_elem != document.body) {
  n_offset = e_elem["scroll" + s_coord];
  if (n_offset && e_elem.style.overflow == 'scroll')
   n_pos -= n_offset;
  e_elem = e_elem.parentNode;
 }
 return n_pos;
}

function f_tcalRelDate (d_date, d_diff, s_units) {
 var s_units = (s_units == 'y' ? 'FullYear' : 'Month');
 var d_result = new Date(d_date);
 d_result['set' + s_units](d_date['get' + s_units]() + d_diff);
 if (d_result.getDate() != d_date.getDate())
  d_result.setDate(0);
 return ' onclick="A_TCALS[\'' + this.s_id + '\'].f_update(' + d_result.valueOf() + ')"';
}

function f_tcalHideAll () {
 for (var i = 0; i < window.A_TCALSIDX.length; i++)
  window.A_TCALSIDX[i].f_hide();
} 

function f_tcalResetTime (d_date) {
 d_date.setHours(0);
 d_date.setMinutes(0);
 d_date.setSeconds(0);
 d_date.setMilliseconds(0);
 return d_date;
}

f_getElement = document.all ?
 function (s_id) { return document.all[s_id] } :
 function (s_id) { return document.getElementById(s_id) };

if (document.addEventListener)
 window.addEventListener('scroll', f_tcalHideAll, false);
if (window.attachEvent)
 window.attachEvent('onscroll', f_tcalHideAll);
 
// global variables
var s_userAgent = navigator.userAgent.toLowerCase(),
 re_webkit = /WebKit\/(\d+)/i;
var b_mac = s_userAgent.indexOf('mac') != -1,
 b_ie5 = s_userAgent.indexOf('msie 5') != -1,
 b_ie6 = s_userAgent.indexOf('msie 6') != -1 && s_userAgent.indexOf('opera') == -1;
var b_ieFix = b_ie5 || b_ie6,
 b_ieMac  = b_mac && b_ie5,
 b_safari = b_mac && re_webkit.exec(s_userAgent) && Number(RegExp.$1) < 500;