function okno(url) {
window.open(url,"","menubar=no,resizable=yes,status=yes,scrollbars=yes,location=yes,toolbar=yes");
}

function showwin(name,size) 
{
attrbts = size + ",resizable=no,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no"
window.open(name, "PEJA", attrbts);
}

//absolutni cesta pro potreby obrazku
var host = (document.location.hostname == "localhost" && false)?"http://localhost/vlado/rak":"http://www.romantikhotel-uraka.cz";

function obrazek_big(url) {
  nPopUp = window.self.open(host+"/data/fotka.php?url="+url,"okno","width=10,height=10,toolbar=no,location=no,directories=no,status=no,scrollbars=no,resizable=no,copyhistory=no");
}

function addToFavorite(){
  if ((navigator.appVersion.indexOf("MSIE") > 0) && (parseInt(navigator.appVersion) >= 4)) {
    window.external.AddFavorite("http://www.romantikhotel-uraka.cz", "Romantik hotel U raka");
  }
}

function setHomePage(homepage,la_url_es) {
    //fce pracuje pouze tehdy, pokud ma element body atribut id="oHomePage"
    var agt=navigator.userAgent.toLowerCase();
    var is_major = parseInt(navigator.appVersion);
    var is_minor = parseFloat(navigator.appVersion);
    var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1)
                && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1)
                && (agt.indexOf('webtv')==-1) && (agt.indexOf('hotjava')==-1));
    var is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
    var is_ie3    = (is_ie && (is_major < 4));
    var is_ie4    = (is_ie && (is_major == 4) && (agt.indexOf("msie 5")==-1) );
    var is_ie4    = (is_ie && (is_major == 4) && (agt.indexOf("msie 5")==-1) && (agt.indexOf("msie 6")==-1));
    var is_ie5up  = (is_ie && !is_ie3 && !is_ie4);
    var is_win   = ( (agt.indexOf("win")!=-1) || (agt.indexOf("16bit")!=-1) );

 if (is_win && is_ie5up) {
		oHomePage.style.behavior='url(#default#homepage)';
		oHomePage.setHomePage(homepage);
	}
}

function oGet(name) {
if (document.getElementById) {
return document.getElementById(name);
} else if (document.all) {
return document.all(name);
} else {
    return null;
}
}


function prepocitej() {

 
 var p_m_r = oGet('prijezdMonth');
 var p_den = oGet('prijezdDay');
 var o_m_r = oGet('odjezdMonth');
 var o_den = oGet('odjezdDay');
 var noci = oGet('pocet_noci');
 
  
 
 var prijezd = (p_m_r[p_m_r.selectedIndex].value).split('/');
 var odjezd =  (o_m_r[o_m_r.selectedIndex].value).split('/');
 
  
 
 var p_den = p_den[p_den.selectedIndex].value;
 var o_den = o_den[o_den.selectedIndex].value;
 


 var pd = new Date(prijezd[1], prijezd[0]-1, p_den);
 var od = new Date(odjezd[1], odjezd[0]-1, o_den);
 

 var timeDifference = od - pd;
  

 
 
 
 if (timeDifference >= 0 && timeDifference < 400 * 86400000)  {
   noci.value = Math.round(eval(timeDifference)/86400000);
 } else {
    noci.value = 0;
 }

}