// Declaring valid date character, minimum year and maximum year
var dtCh= "/";
var minYear=2010;
var maxYear=2020;

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(0,pos1);
	var strDay=dtStr.substring(pos1+1,pos2);
	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("The date format should be : mm/dd/yyyy");
		return false;
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Please enter a valid month");
		return false;
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Please enter a valid day");
		return false;
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear);
		return false;
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date");
		return false;
	}
return true;
}

function check(form) {
	var firstName = document.getElementById("first_name");
	if (firstName != null && firstName.value == "") {
        alert("First name is required.");
            return false;
        }
        var lastName = document.getElementById("last_name");
        if (lastName != null && lastName.value == "") {
            alert("Last name is required.");
            return false;
        }
    var emailAddress = document.getElementById("email");
	if (emailAddress != null && emailAddress.value == "") {
        alert("Email address is required.");
        return false;
    }    
	var schoolDistrictName = document.getElementById("00N40000002IehG");
    if (schoolDistrictName != null && schoolDistrictName.selectedIndex == 0) {
        alert("School District Name is required.");
        return false;
	}
    var schoolDisctrictCity = document.getElementById("city");
    if (schoolDisctrictCity != null && schoolDisctrictCity.value == "") {
        alert("School District City is required.");
        return false;
    }
    var schoolDisctrictState = document.getElementById("state");
    if (schoolDisctrictState != null && schoolDisctrictState.value == "") {
        alert("School District State is required.");
        return false;
    }
    var bksDate1 = document.getElementById("00N40000002IegD");
	if (bksDate1 != null && bksDate1.value != "") {
		if (isDate(bksDate1.value)==false) {
			bksDate1.focus();
			return false;
		}
	}
	var bksDate2 = document.getElementById("00N40000002IegI");
	if (bksDate2 != null && bksDate2.value != "") {
		if (isDate(bksDate2.value)==false) {
			bksDate2.focus();
			return false;
		}
	}
	var atDate1 = document.getElementById("00N40000002Iefj");
	if (atDate1 != null && atDate1.value != "") {
		if (isDate(atDate1.value)==false) {
			atDate1.focus();
			return false;
		}
	}
	var atDate2 = document.getElementById("00N40000002Iefo");
	if (atDate2 != null && atDate2.value != "") {
		if (isDate(atDate2.value)==false) {
			atDate2.focus();
			return false;
		}
	}
    return true;
}
	
$(document).ready(function() {
    // Hide fieldsets
    $('fieldset#bookshareWorkshop').addClass('hidden');
    $('fieldset#studentNeedsWorkshop').addClass('hidden');
    
    // Check if "Bookshare in Depth" workshop is selected
    $('input#workshopTypes0').click(function() {
        
        // If selected, show corresponding fieldset
        if ($('input#workshopTypes0:checked').val() != null) {
            $('fieldset#bookshareWorkshop').show('slow');
        }
        
        // Otherwise, hide fieldset
        else {
            $('fieldset#bookshareWorkshop').hide('fast');
        }
    });
    
    // Check if "Student Needs" workshop is selected
    $('input#workshopTypes1').click(function() {
        
        // If selected, show corresponding fieldset
        if ($('input#workshopTypes1:checked').val() != null) {
            $('fieldset#studentNeedsWorkshop').show('slow');
        }
        
        // Otherwise, hide fieldset
        else {
            $('fieldset#studentNeedsWorkshop').hide('fast');
        }
    });
});