window.onload = function(){ bscal.init() }
var bscal = {
    left : 0,
    top  : 0,
    width: 0,
    height: 0,
    format: "%d.%m.%Y",


 wds_eng  : new Array("mo","tu","we","th","fr","sa","su"),
 wds_ukr  : new Array("пн","вт","ср","чт","пт","сб","нд"),
    wds  : new Array("пн","вт","ср","чт","пт","сб","вс"),
    mns  : new Array("Январь","Февраль","Март","Апрель","Май","Июнь","Июль","Август","Сентябрь","Октябрь","Ноябрь","Декабрь"),
mns_eng  : new Array("January","February","March","April","May","June","July","August","September","October","November","December"),
mns_ukr  : new Array("Сiчень","Лютий","Березень","Квiтень","Травень","Червень","Липень","Серпень","Вересень","Жовтень","Листопад","Грудень"),
    dim  : new Array(31,28,31,30,31,30,31,31,30,31,30,31),

    nowD : new Date().getDate(),
    nowM : new Date().getMonth()+1,
    nowY : new Date().getFullYear(),

        curD : null,
    curM : null,
    curY : null,

    minY : 2007,  /*new Date().getFullYear()*/
    maxY : new Date().getFullYear() + 5,

    css  : document.createElement("link"),
    div  : document.createElement("div"),
    ifr  : document.createElement("iframe"),
    msel : null,
    ysel : null,
    obj  : null,
    id_to: null,
    hover: null,
        init : function()
        {

                bscal.css.rel = "stylesheet";
                bscal.css.href= "bs_calendar.css";
                document.body.appendChild(bscal.css);
        bscal.div.id = 'bscal';
        bscal.div.innerHTML = bscal.html();
        bscal.div.style.display = "none";
        document.body.appendChild(bscal.div);
        if(document.getElementById("bs_month")!=null) {
        bscal.msel = document.getElementById("bs_month");
        bscal.msel.style.width = "100%";

        lang = document.getElementById('lng');
        if(lang.value=='ENG') {
          document.getElementById('cel_today').innerHTML = 'today';
          for (var i=0;i<bscal.mns_eng.length;i++)
          bscal.msel.options[i] = new Option(bscal.mns_eng[i], i+1);
        }
        else if(lang.value=='UKR') {
          document.getElementById('cel_today').innerHTML = 'сьогоднi';
          for (var i=0;i<bscal.mns_ukr.length;i++)
          bscal.msel.options[i] = new Option(bscal.mns_ukr[i], i+1);
        }
        else {
          document.getElementById('cel_today').innerHTML = 'сегодня';
          for (var i=0;i<bscal.mns.length;i++)
          bscal.msel.options[i] = new Option(bscal.mns[i], i+1);
        }

        bscal.ysel = document.getElementById("bs_year");
        bscal.ysel.style.width = "100%";
        for (var i=0;i<=bscal.maxY-bscal.minY;i++)
        bscal.ysel.options[i] = new Option(bscal.maxY-i, bscal.maxY-i);

        bscal.ifr.id = 'bsifr';
                bscal.ifr.src = "about:blank";
        bscal.ifr.marginwidth = bscal.ifr.marginheight = bscal.ifr.frameborder = 0;
        bscal.ifr.style.display = "none";
                document.body.appendChild(bscal.ifr);
                //alert(bscal.nowD+'-'+bscal.nowM+'-'+bscal.nowY)
        }
        },
        draw : function()
        {

        //очищаем дни
            for (var y=1;y<=6;y++)
            for (var x=1;x<=7;x++){
            var el = document.getElementById("cell_"+y+"_"+x)
              if(el!=null) {
                el.className   = (x <6) ? "day" : "weekend";
                el.style.cursor = 'default';
                el.innerHTML   = "&nbsp;";
              }
            }
        //alert(bscal.curD+'-'+bscal.curM+'-'+bscal.curY)
            all_days = (bscal.curM == 2 && bscal.isLeap(bscal.curY)) ? 29 : bscal.dim[bscal.curM-1];
            begin = new Date(bscal.curY,bscal.curM-1,1).getDay();

            //заполняем месяц
         y=1; x=begin!=0 ? begin:7;
         for (c=1;c<=all_days;c++)
         {

         var el = document.getElementById("cell_"+y+"_"+x)
         if(el!=null) {
         if (bscal.istoday(c)){el.className="today";}

             el.innerHTML   = c;
             el.style.cursor = 'pointer';
         }
         x++; if (x>7){x=1;y++;}
         }
        },
        retD : function(r_day){

        current_year = new Date().getFullYear();
        current_month = new Date().getMonth() + 1;

        curM = document.getElementById('bs_month');


        lang = document.getElementById('lng');
        if(lang.value=='RUS')
          msg_date_over = 'Дата, которую вы выбираете уже прошла';
        else if(lang.value=='UKR')
          msg_date_over = 'Дата, яку ви вибираєте вже пройшла';
        else if(lang.value=='ENG')
          msg_date_over = 'Date, you entered have already passed';


        if(bscal.curY<current_year) {
          r_day="&nbsp;";
          alert(msg_date_over);
        }

        if(bscal.curY==current_year)  {
          if( curM.value>=current_month ) {
            if(r_day<bscal.curD && curM.value==current_month) {
              r_day="&nbsp;";
              alert(msg_date_over);
            }
          }  
          else {
              r_day="&nbsp;";
              alert(msg_date_over);
          }
        }

        date_start = document.getElementById('date_start').value;

        temp_obj = document.getElementById('arrival');
        if(temp_obj!=null)
          date_start_1 = document.getElementById('arrival').value;

        date_start_day = '';
        date_start_day = date_start.split(".");
        date_start_day_1 = '';
        if(temp_obj!=null)
          date_start_day_1 = date_start_1.split(".");


        lang = document.getElementById('lng');
        if(lang.value=='RUS')
          msg_date_ot = 'Дата отъезда должна быть на день позже даты приезда';
        else if(lang.value=='UKR')
          msg_date_ot = 'Дата від\'їзду повинна бути на день пізніше дати приїзду';
        else if(lang.value=='ENG')
          msg_date_ot = 'Departure date must be at list one day after arrival date';


        if((bscal.obj.id=='date_end' || bscal.obj.id=='departure') && parseInt(bscal.curY)-parseInt(date_start_day[2])<=0 && r_day!='&nbsp;' ) {
          if(bscal.curY==date_start_day[2]) {
            if(parseInt(r_day)-parseInt(date_start_day[0])<0 && parseInt(curM.value)-parseInt(date_start_day[1])<=0) {
              alert(msg_date_ot);
              r_day="&nbsp;";
            }
          }
        }

        /*
        if( (bscal.obj.id=='date_end' || bscal.obj.id=='departure') && r_day<=date_start_day[0] && r_day!='&nbsp;' && curM.value<=current_month) {
          alert(msg_date_ot);
          r_day="&nbsp;";
        }

        if(temp_obj!=null) {
          if( bscal.obj.id=='departure' && r_day<=date_start_day_1[0] && curM.value<=current_month && r_day!='&nbsp;') {
            alert(msg_date_ot);
            r_day="&nbsp;";
          }
        }
        */


        if (!r_day || r_day=="&nbsp;") return false;
        res = bscal.format;
            res = res.replace("%d",(r_day < 10 ? "0":"") + r_day);
            res = res.replace("%m",(bscal.curM<10?"0":"") + bscal.curM);
            res = res.replace("%Y",bscal.curY);
            bscal.obj.value = res;
            bscal.hide();
        },
        istoday : function(day){
    return (bscal.nowD==day && bscal.curM==bscal.nowM && bscal.curY == bscal.nowY) ? true : false;
        },

    dover : function(el){
    if (el.innerHTML=='&nbsp;') return false;
    bscal.hover = el.className;
    el.className = 'over';
    },
    dout  : function(el){
    if (el.innerHTML=='&nbsp;') return false;
    el.className = bscal.hover;
    bscal.hover = null;
    },
        today : function(){
            bscal.curD = bscal.nowD;
            bscal.curM = bscal.nowM;
            bscal.curY = bscal.nowY;
        bscal.scroll_M(0);
        },
        change_M : function (dir){
            bscal.curM = dir*1;
            bscal.scroll_Y(0);
        },
    scroll_M : function (dir){
            bscal.curM = bscal.curM + dir;
            if (bscal.curM < 1) {
                bscal.curM = 12;
                bscal.curY -= 1;
            }
            if (bscal.curM > 12) {
                bscal.curM = 1;
                bscal.curY += 1;
            }
        if(document.getElementById('bs_month')!=null)
          document.getElementById('bs_month').selectedIndex=bscal.curM-1
            bscal.scroll_Y(0);
        },
    change_Y : function (dir){
    if (dir.length != 4) return false;
    bscal.curY = dir*1;
    bscal.scroll_Y(0);
    },
        scroll_Y : function (dir){
            bscal.curY+= dir;
            if (bscal.curY < bscal.minY) bscal.curY = bscal.minY;
            if (bscal.curY > bscal.maxY) bscal.curY = bscal.maxY;
        if(document.getElementById('bs_year')!=null)
          document.getElementById('bs_year').value = bscal.curY;
        bscal.draw();
        },

    isLeap : function (year) {
        return (((year % 4)==0) && ((year % 100)!=0) || ((year % 400)==0)) ? true : false },

        html : function()
        {
            var res  = "";
        res += "<table cellpadding=0 cellspacing=0 width='100%' class='top'>\n";
            res += "<tr><td onclick='bscal.hide();' align=right style='cursor:pointer' colspan='2'>x</td></tr>\n";
            res += "</table>";
            res += "<table cellpadding=0 cellspacing=1 width=100% unselectable=on>\n";
            res += "<tr unselectable=on><td colspan=4 unselectable=on><select id='bs_month' class='selec1' onchange=\"bscal.change_M(this.value);bscal.div.focus();\"></select></td><td colspan=2 unselectable=on><select id='bs_year' class='selec1'  type='text' style='width:100%' onchange=\"bscal.change_Y(this.value);\" onkeyup=\"bscal.change_Y(this.value);\"></select></td></tr>\n";
            res += "<tr unselectable=on align=center>\n";

            lang = document.getElementById('lng');
            if(lang.value=='ENG') {
              for (var x=0;x<7;x++)
              res += "<TD class=week width=30 unselectable=on>"+bscal.wds_eng[x]+"</TD>\n";
            }
            else if(lang.value=='UKR') {
              for (var x=0;x<7;x++)
              res += "<TD class=week width=30 unselectable=on>"+bscal.wds_ukr[x]+"</TD>\n";
            }
            else {
              for (var x=0;x<7;x++)
              res += "<TD class=week width=30 unselectable=on>"+bscal.wds[x]+"</TD>\n";
            }

            res += "</tr>";
            for (var y=1;y<=6;y++)
            {
            res += "<TR align=center unselectable=on bgcolor='#e2e2e2'>\n";
                for (var x=1;x<=7;x++){
                res += "<td id='cell_"+y+"_"+x+"' onmouseover=\"bscal.dover(this);\" onmouseout=\"bscal.dout(this);\" onclick=\"bscal.retD(this.innerHTML);\" unselectable=on>"+y+"_"+x+"</td>\n";
                }
            res += "</TR>\n";
            }
            res += "<tr align=center>\n"+
                   "<td class=bot onClick=bscal.scroll_Y(-1);>&laquo;</td><td class=bot onClick=bscal.scroll_M(-1);>&lt;</td>\n"+
                   "<td colspan=3 class=bot id='cel_today' onClick=\"bscal.today();bscal.retD("+bscal.nowD+");\"></td>\n"+
                   "<td class=bot onClick=bscal.scroll_M(1);>&gt;</td><td class=bot onClick=bscal.scroll_Y(1);>&raquo;</td>\n"+
                   "</tr>\n";
            res += "</table>";
        return res;},

        show : function(id_to) {
            if (id_to==bscal.id_to){
        bscal.hide(); return false;
            }
        bscal.id_to = id_to;
                bscal.obj = document.getElementById(id_to);
            var pos = bscal.pos(bscal.obj);
                    pos.x += bscal.left;
                    pos.y += bscal.obj.offsetHeight+bscal.top;

                bscal.today();
    if ((pos.y+bscal.height)>document.body.offsetHeight)pos.y-= bscal.height+bscal.obj.offsetHeight;
    if ((pos.x+bscal.width)>document.body.offsetWidth)pos.x = document.body.offsetWidth-bscal.width;
    bscal.div.style.display = "block";
    bscal.ifr.style.display = "block";
        bscal.width  = bscal.ifr.style.width  = bscal.div.offsetWidth;
        bscal.height = bscal.ifr.style.height = bscal.div.offsetHeight;
    bscal.div.style.left = bscal.ifr.style.left = pos.x;
    bscal.div.style.top  = bscal.ifr.style.top  = pos.y;
        },

        hide : function() {
        bscal.id_to = null;
            bscal.div.style.display = "none";
            bscal.ifr.style.display = "none";
        },
    pos  : function (el) {
        var r = { x: el.offsetLeft, y: el.offsetTop };
        if (el.offsetParent) {
                var tmp = bscal.pos(el.offsetParent);
                r.x += tmp.x;
                r.y += tmp.y;
        }
return r;}

};