// DATE VALIDATION
var _curDate = new Date();
var dtCh= "-";
var minYear=_curDate.getFullYear();
var maxYear=minYear+1;

//CHECK FOR NUMERIC VALUE
function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    return true;
}

//STRIPPING
function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

//VALIDATE SPECIAL FEBRUARY
function daysInFebruary (year){
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}

//ARRAY DATE
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31;
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this;
}

//CORE DATE CHECK
function isDate(dtStr,sPrefix){
	var daysInMonth = DaysArray(12);
	var pos1=dtStr.indexOf(dtCh);
	var pos2=dtStr.indexOf(dtCh,pos1+1);
	var strMonth=dtStr.substring(pos1+1,pos2);
	var strDay=dtStr.substring(0,pos1);
	var strYear=dtStr.substring(pos2+1);
	strYr=strYear;
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1);
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1);
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1);
	}
	month=parseInt(strMonth);
	day=parseInt(strDay);
	year=parseInt(strYr);
	// NOT VALID
	if (pos1==-1 || pos2==-1){
		alert("The date format should be : dd-mm-yyyy"+sPrefix);
		return false;
	}
	//DAY CHECK VALID
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Please enter a valid day"+sPrefix);
		return false;
	}	
	//MONTH CHECK VALID
	if (strMonth.length<1 || month<1 || month>12){
		alert("Please enter a valid month"+sPrefix);
		return false;
	}
	//YEAR CHECK VALID
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear+sPrefix);
		return false;
	}
	// STRIP UNWATED CHAR
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date"+sPrefix);
		return false;
	}
return true;
}

// END DATE VALIDATION

//GET FORM VALUE
function getForm(eName){
	var _return = document.getElementById(eName).value;
	return _return;	
}
// INTERACTIVE SUBMIT BUTTON
function FireSubmit(what){
	var oSubmit;
	oSubmit = document.getElementById('submit');	
	if(what==1){
	oSubmit.value = 'Please Wait...';
	oSubmit.disabled = true;	
	}else{
	oSubmit.value = 'Send!';
	oSubmit.disabled = false;			
	}
}


// POPULATE FORM VALUE
function Komang(){
	
	FireSubmit(1);
	
	var book_name   	= getForm('book_name');
	var book_email  	= getForm('book_email');
	var book_phone  	= getForm('book_phone');
	var book_checkin  	= getForm('book_checkin');
	var book_checkout 	= getForm('book_checkout');
	var book_spam 		= getForm('book_spam');
	
	if (book_name.length<2||book_name.length>100){
		alert('Your name min 2 characters and max 100 characters in length');
		FireSubmit();
		return false;
	}//book_name
	
	var objRegExp  = /^[a-zA-Z0-9.][a-zA-Z0-9-_\s]+@[a-zA-Z0-9-\s].+\.[a-zA-Z]{2,5}$/;
	if (!objRegExp.test(book_email)){
		alert('invalid email address!');
		FireSubmit();
		return false;
	}//book_email	
	
	if (book_phone.length<5||book_phone.length>15){
		alert('Your phone required (5 to 15 characters in length)');
		FireSubmit();
		return false;
	}//book_phone	
	
	if (!isDate(book_checkin,' in Checkin Date Field')){
		FireSubmit();
		return false;
	}//book_checkin
	
	if (!isDate(book_checkout,' in Checkout Date Field')){
		FireSubmit();
		return false;
	}//book_checkout
	
	if (book_spam.length != 6){
		alert('Type the code to verify you are not spam');
		FireSubmit();
		return false;
	}//book_spam
	
	return true;
	
}//POPULATE FORM