function changeroom()
{
    var roomnum = document.getElementById("ddlroom").value;
    var adultnum = document.getElementById("ddladult").value
    
    roomnum = parseInt(roomnum);
    adultnum = parseInt(adultnum);
    
    if(roomnum > adultnum)
    {
        document.getElementById("ddladult").selectedIndex = (roomnum - 1);
    }
}

function changeadult()
{
    var roomnum = document.getElementById("ddlroom").value;
    var adultnum = document.getElementById("ddladult").value
    
    roomnum = parseInt(roomnum);
    adultnum = parseInt(adultnum);
    
    if(adultnum < roomnum)
    {
        document.getElementById("ddlroom").selectedIndex = (adultnum - 1);
    }
}

function submitform()
{ 
    if(document.getElementById("txtcalendarin").value != "" && document.getElementById("txtcalendarout").value != "" && document.getElementById("ddlroom").value != "" && document.getElementById("ddladult").value != "" && document.getElementById("ddlchild").value != "")
    {
        var dayin = document.getElementById("txtcalendarin").value;
        var dayout = document.getElementById("txtcalendarout").value;

        var url = "https://reservation.travelanium.net/propertyibe/?propertyId=SRTPSB&onlineId=6677960439" + "&checkin=" + document.getElementById("txtcalendarin").value + "&checkout=" + dayout + "&numofroom=" + document.getElementById("ddlroom").value + "&numofadult=" + document.getElementById("ddladult").value + "&numofchild=" + document.getElementById("ddlchild").value;
        window.location = url;

    }
    else
    {
        alert("Please select your preferred Check-in date, Number of nights, Number of room, Number of adult, and Number of child for your stay");
    }
}