/**

 * DHTML date validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)

 */

// Declaring valid date character, minimum year and maximum year

var dtCh= "/";
var minYear=1900;
var maxYear=2100;

function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }

    // All characters are numbers.
    return true;
}



function stripCharsInBag(s, bag){
	var i;
    var returnString = "";

    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.

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

}


function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );

}

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
}


function isDate(dtStr){
	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)
	if (pos1==-1 || pos2==-1){
		alert('Date format: dd/mm/yyyy')
		return false
	}

	if (strMonth.length<1 || month<1 || month>12){
		alert('Type a valid month') 
		return false
	} 

	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert('Type a valid date')
		return false
	}

	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert('Type a valid year')
		return false
	}

	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert('Type a valid date')
		return false
	}

   return true
}



function ValidateForm(frm){

 	var dt=frm.since
	if (isDate(dt.value)==false){
		dt.focus()
		return false
	} 

	var dt=frm.to
	if (isDate(dt.value)==false){
		dt.focus()
		return false
	}	


	var fe_since = frm.since.value;
	var fe_to = frm.to.value;	
	
    var pos1=fe_since.indexOf(dtCh)
	var pos2=fe_since.indexOf(dtCh,pos1+1)

	var strMonth=fe_since.substring(pos1+1,pos2)
	var strDay=fe_since.substring(0,pos1)
	var strYear=fe_since.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)
    month=parseInt(strMonth)-1
	day=parseInt(strDay)
	year=parseInt(strYr)

    dt_fe_ori = new Date(year,month,day,0,0,0,0);
	dt_fe_ori_ori = new Date(year,month,day,0,0,0,0);

	var dt = new Date();
	var dtfx = new Date(dt.getFullYear(), dt.getMonth(), dt.getDate(), 0, 0, 0, 0)
	dtfx.setDate(dtfx.getDate()+1);

    if ( dt_fe_ori < dtfx )
    {
	  alert('Reservation must be made at least 24 hours before your pick-up time')
	  return false
    }	

    var pos1=fe_to.indexOf(dtCh)
	var pos2=fe_to.indexOf(dtCh,pos1+1)	

	var strMonth=fe_to.substring(pos1+1,pos2)
	var strDay=fe_to.substring(0,pos1)
	var strYear=fe_to.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)	
    month=parseInt(strMonth)-1
	day=parseInt(strDay)
	year=parseInt(strYr)

	dt_fe_des = new Date(year,month,day,0,0,0,0);

	if ( dt_fe_des < dt_fe_ori )
	{
	  alert('Return date cannot precede pick-up date')
	  return false	
	}

	dt_fe_ori.setDate(dt_fe_ori.getDate()+1);

	if ( dt_fe_des < dt_fe_ori )
	{
	  alert('Reservation must be at least one day')
	  return false		
	}

	dt_fe_ori_ori.setDate(dt_fe_ori_ori.getDate()+30);

    if ( dt_fe_des > dt_fe_ori_ori )
	{
	  alert('Reservation cannot exceed 30 days')
	  return false			
	}
	
	
	if ( frm.name.value.length == 0 )
	  {
		alert('Type first name');
		frm.name.focus();
		return false;
	  }
	  
	  if ( frm.lastname.value.length == 0 )
	  {
		alert('Type last name');
		frm.lastname.focus();
		return false;
	  }		  
  	  
	  if (( frm.email.value.length == 0 ) || (frm.email.value.indexOf("@") == 0 ) )
	  {
		alert('Type email');
		frm.email.focus();
		return false;
	  }		  		 		  		  	
	  
	  if ( frm.phone.value.length == 0 )
	  {
		alert('Type phone number');
		frm.phone.focus();
		return false;
	  }		  		 		  
	  
		
    return true

 }