function check_form(){
     var start_date = document.form.start_date.value;
     var end_date = document.form.end_date.value;
     var exact_date = document.form.exact_date.value;
     var number = document.form.adults.value;
     var name = document.form.name_person.value;
     var email = document.form.email.value;
     var phone = document.form.mobile.value;
      
     var flag = dateWithin(start_date,end_date,exact_date);
     
     if(!flag){
        alert("Exact Must be within Start Date and End Date");
        return false;
     }
      
      if(parseInt(number)!=number-0){
        alert('Number of People is Inappropriate');
        return false;
      }
      if(name==""){
        alert("Enter your name");
        return false;
      }
      if(email==""){
        alert("Enter your email");
        return false;
      }
      if(phone==""){
        alert("Enter your phone");
        return false;
      }
      return true;
 }
 
 function dateWithin(beginDate,endDate,checkDate) {
    var b,e,c;
    b = getDateFromFormat(beginDate,'d/M/y');
    e = getDateFromFormat(endDate,'d/M/y');
    c = getDateFromFormat(checkDate,'d/M/y');
    
    if((c <= e && c >= b)) {
        return true;
    }
    return false;
}


function getDateFromFormat(val,format) {
    val=val+"";
    format=format+"";
    var i_val=0;
    var i_format=0;
    var c="";
    var token="";
    var token2="";
    var x,y;
    var now=new Date();
    var year=now.getYear();
    var month=now.getMonth()+1;
    var date=1;
    var hh=now.getHours();
    var mm=now.getMinutes();
    var ss=now.getSeconds();
    var ampm="";
    
    while (i_format < format.length) {
        // Get next token from format string
        c=format.charAt(i_format);
        token="";
        while ((format.charAt(i_format)==c) && (i_format < format.length)) {
            token += format.charAt(i_format++);
            }
        // Extract contents of value based on format token
        if (token=="yyyy" || token=="yy" || token=="y") {
            if (token=="yyyy") { x=4;y=4; }
            if (token=="yy")   { x=2;y=2; }
            if (token=="y")    { x=2;y=4; }
            year=_getInt(val,i_val,x,y);
            if (year==null) { return 0; }
            i_val += year.length;
            if (year.length==2) {
                if (year > 70) { year=1900+(year-0); }
                else { year=2000+(year-0); }
                }
            }
        else if (token=="MMM"||token=="NNN"){
            month=0;
            for (var i=0; i<MONTH_NAMES.length; i++) {
                var month_name=MONTH_NAMES[i];
                if (val.substring(i_val,i_val+month_name.length).toLowerCase()==month_name.toLowerCase()) {
                    if (token=="MMM"||(token=="NNN"&&i>11)) {
                        month=i+1;
                        if (month>12) { month -= 12; }
                        i_val += month_name.length;
                        break;
                        }
                    }
                }
            if ((month < 1)||(month>12)){return 0;}
            }
        else if (token=="EE"||token=="E"){
            for (var i=0; i<DAY_NAMES.length; i++) {
                var day_name=DAY_NAMES[i];
                if (val.substring(i_val,i_val+day_name.length).toLowerCase()==day_name.toLowerCase()) {
                    i_val += day_name.length;
                    break;
                    }
                }
            }
        else if (token=="MM"||token=="M") {
            month=_getInt(val,i_val,token.length,2);
            if(month==null||(month<1)||(month>12)){return 0;}
            i_val+=month.length;}
        else if (token=="dd"||token=="d") {
            date=_getInt(val,i_val,token.length,2);
            if(date==null||(date<1)||(date>31)){return 0;}
            i_val+=date.length;}
        else if (token=="hh"||token=="h") {
            hh=_getInt(val,i_val,token.length,2);
            if(hh==null||(hh<1)||(hh>12)){return 0;}
            i_val+=hh.length;}
        else if (token=="HH"||token=="H") {
            hh=_getInt(val,i_val,token.length,2);
            if(hh==null||(hh<0)||(hh>23)){return 0;}
            i_val+=hh.length;}
        else if (token=="KK"||token=="K") {
            hh=_getInt(val,i_val,token.length,2);
            if(hh==null||(hh<0)||(hh>11)){return 0;}
            i_val+=hh.length;}
        else if (token=="kk"||token=="k") {
            hh=_getInt(val,i_val,token.length,2);
            if(hh==null||(hh<1)||(hh>24)){return 0;}
            i_val+=hh.length;hh--;}
        else if (token=="mm"||token=="m") {
            mm=_getInt(val,i_val,token.length,2);
            if(mm==null||(mm<0)||(mm>59)){return 0;}
            i_val+=mm.length;}
        else if (token=="ss"||token=="s") {
            ss=_getInt(val,i_val,token.length,2);
            if(ss==null||(ss<0)||(ss>59)){return 0;}
            i_val+=ss.length;}
        else if (token=="a") {
            if (val.substring(i_val,i_val+2).toLowerCase()=="am") {ampm="AM";}
            else if (val.substring(i_val,i_val+2).toLowerCase()=="pm") {ampm="PM";}
            else {return 0;}
            i_val+=2;}
        else {
            if (val.substring(i_val,i_val+token.length)!=token) {return 0;}
            else {i_val+=token.length;}
            }
        }
    // If there are any trailing characters left in the value, it doesn't match
    if (i_val != val.length) { return 0; }
    // Is date valid for month?
    if (month==2) {
        // Check for leap year
        if ( ( (year%4==0)&&(year%100 != 0) ) || (year%400==0) ) { // leap year
            if (date > 29){ return 0; }
            }
        else { if (date > 28) { return 0; } }
        }
    if ((month==4)||(month==6)||(month==9)||(month==11)) {
        if (date > 30) { return 0; }
        }
    // Correct hours value
    if (hh<12 && ampm=="PM") { hh=hh-0+12; }
    else if (hh>11 && ampm=="AM") { hh-=12; }
    var newdate=new Date(year,month-1,date,hh,mm,ss);
    return newdate.getTime();
    }




 function _getInt(str,i,minlength,maxlength) {
    for (var x=maxlength; x>=minlength; x--) {
        var token=str.substring(i,i+x);
        if (token.length < minlength) { return null; }
        if (_isInteger(token)) { return token; }
        }
    return null;
    }
    
function _isInteger(val) {
    var digits="1234567890";
    for (var i=0; i < val.length; i++) {
        if (digits.indexOf(val.charAt(i))==-1) { return false; }
        }
    return true;
    }