function MM_findObj(n, d) { //v4.0
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && document.getElementById) x=document.getElementById(n); return x;
}

function MM_showHideLayers() { //v3.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v='hide')?'hidden':v; }
    obj.visibility=v; }
}

var picture = null;
function popImage(img_path, img_alt, img_author, img_width, img_height)
{
  var html;
  var img_src = img_path;
  
  l = 10;
  t = 10;
  var screen_width = img_width +30;
  var screen_height = img_height + 30;
  
  if ( picture!=null && !picture.closed) {
  	picture.close();
	picture = null;
  }
  
  var title = img_alt ? img_alt : "Photo";
  
  html = "<html><head><title>"+title+"</title></head><body leftmargin='0' topmargin='7'>";
  html+= "<table width='100%' cellpadding='5' cellspacing='0' border='0' align='center' height='100%'>";
  html+= "<tr><td width='100%' align='center' valign='middle' height='100%'><img src='"+img_src;
  html+= "' border='1'>";
  if (img_author)
    html+= "<br><small>"+img_author+"</small>";
  html+= "</td></tr></table></body></html>";

  picture = window.open('', 'picture', 'width='+screen_width+',height='+screen_height+',status=no,location=no,resizable=yes,scrollbars=no,top='+t+',left='+l);
  picture.document.write(html);
  picture.focus();
  return;
}

function validate() {
	f = document.bookform;
	day = f.day.options[f.day.selectedIndex].value;
	month = f.month.options[f.month.selectedIndex].value;
	year = f.year.options[f.year.selectedIndex].value;
	if (f.t_id.options[f.t_title.selectedIndex].value == "-") {
		alert("Please select tour");
		return false;
	}
	if (!f.tb_name.value) {
		alert("Please enter your name");
		return false;
	}
	if (!f.tb_surname.value) {
		alert("Please enter your surname");
		return false;
	}
	if (!f.tb_country.selectedIndex) {
		alert("Please select your country");
		return false;
	}
	if (!isDate(year,month,day)) {
		alert("Please enter valid date of arrival");
		return false;
	}	
	if (!f.tb_person_number.value) {
		alert("Please enter the number of persons");
		return false;
	}	
	return true;
}

function getYear(d) {
  return (d < 1000) ? d + 1900 : d;
  }

function isDate (year, month, day) {
  // month argument must be in the range 1 - 12
  month = month - 1;  // javascript month range : 0- 11
  var tempDate = new Date(year,month,day);
  if ( (getYear(tempDate.getYear()) == year) &&
     (month == tempDate.getMonth()) &&
     (day == tempDate.getDate()) )
      return true;
  else
     return false
  }
 
  function validate_lt() {
	f = document.bookform;
	if (!f.t_id.selectedIndex) {
		alert("Prašome pasirinkti turą");
		return false;
	}
	if (!f.tb_name.value) {
		alert("Jūs neįvedėte savo vardo");
		return false;
	}
	if (!f.tb_surname.value) {
		alert("Jūs neįvedėte savo pavardės");
		return false;
	}
	if (!f.tb_country.value) {
		alert("Prašome nurodyti šalį");
		return false;
	}
	if (!f.tb_person_number.value) {
		alert("Prašome nurodyti žmonių kiekį");
		return false;
	}	
	return true;
}

function validateHotel() {
	f = document.bookform;
	dayfrom = f.dayfrom.options[f.dayfrom.selectedIndex].value;
	monthfrom = f.monthfrom.options[f.monthfrom.selectedIndex].value;
	yearfrom = f.yearfrom.options[f.yearfrom.selectedIndex].value;
	dayto = f.dayto.options[f.dayto.selectedIndex].value;
	monthto = f.monthto.options[f.monthto.selectedIndex].value;
	yearto = f.yearto.options[f.yearto.selectedIndex].value;
	if (!f.hb_name.value) {
		alert("Please enter your name");
		return false;
	}
	if (!f.hb_surname.value) {
		alert("Please enter your surname");
		return false;
	}
	if (!f.hb_country.selectedIndex) {
		alert("Please select your country");
		return false;
	}
		if (!f.h_id.selectedIndex) {
		alert("Please select the hotel");
		return false;
	}	
		if (!isDate(yearfrom,monthfrom,dayfrom)) {
		alert("Please enter valid date from");
		return false;
	}	
	if (!isDate(yearto,monthto,dayto)) {
		alert("Please enter valid date to");
		return false;
	}	
	if (!f.hb_room_type.value) {
		alert("Please enter room type");
		return false;
	}	
	return true;
}
