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(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 isNumeric(e){
if (event.keyCode < 48 || event.keyCode > 57){
    alert("Only Numbers, please.");
    return false;
}
}

function validateLogin() {
	if (document.rgilogin.uname.value == "") {
		alert("Username is required.");
		document.rgilogin.uname.focus();
	return (false);
	}
	if (document.rgilogin.upass.value == "") {
		alert("Username is required.");
		document.rgilogin.upass.focus();
	return (false);
	}
}

function validateForm() {
	if(document.recipeForm.recipeTitle.value == "") {
		alert("recipe title is required.");
		document.recipeForm.recipeTitle.focus();
	return (false);
	}
	var categorySelect_choice = false;
	for (categorySelect_counter = 0; categorySelect_counter < document.recipeForm.categorySelect.length; categorySelect_counter++) {
		if (document.recipeForm.categorySelect[categorySelect_counter].checked) {
			categorySelect_choice = categorySelect_choice + 1; 
		}
	}
	if (categorySelect_choice > 15) {
		msg="You're limited to only three selections for Question 4.1.\n"
		msg=msg + "You have made " + categorySelect_choice + " selections.\n"
		msg=msg + "Please remove " + (categorySelect_choice-4) + " selection(s)."
		alert(msg)
		return (false);
	}
	if (categorySelect_choice < 1) {
		alert("please choose at least one category.");
		document.recipeForm.recipeTitle.focus();
		return (false);
	}
	if(document.recipeForm.recipeIngredients.value == "") {
		alert("recipe ingredients are required.");
		document.recipeForm.recipeIngredients.focus();
	return (false);
	}
	if(document.recipeForm.recipeInstructions.value == "") {
		alert("recipe instructions are required.");
		document.recipeForm.recipeInstructions.focus();
	return (false);
	}
	if(document.recipeForm.recipeOwner.value == "") {
		alert("please sign your recipe.");
		document.recipeForm.recipeOwner.focus();
	return (false);
	}
	if(document.recipeForm.recipeAddress.value == "") {
		alert("please include your address.");
		document.recipeForm.recipeAddress.focus();
	return (false);
	}
	if(document.recipeForm.recipeCity.value == "") {
		alert("please include your city.");
		document.recipeForm.recipeCity.focus();
	return (false);
	}
	if(document.recipeForm.recipeState.value == "") {
		alert("please include your state.");
		document.recipeForm.recipeState.focus();
	return (false);
	}
	if(document.recipeForm.recipeZipcode.value == "") {
		alert("please include your zipcode.");
		document.recipeForm.recipeZipcode.focus();
	return (false);
	}
	if(document.recipeForm.recipeTelephone.value == "") {
		alert("please include your phone number.");
		document.recipeForm.recipeTelephone.focus();
	return (false);
	}
	if(document.recipeForm.recipeEmail.value == "") {
		alert("please include your email address.");
		document.recipeForm.recipeEmail.focus();
	return (false);
	}
return (true);
}

function validateFormSimple() {
	if(document.recipeForm.recipeTitle.value == "") {
		alert("recipe title is required.");
		document.recipeForm.recipeTitle.focus();
	return (false);
	}
	var categorySelect_choice = false;
	for (categorySelect_counter = 0; categorySelect_counter < document.recipeForm.categorySelect.length; categorySelect_counter++) {
		if (document.recipeForm.categorySelect[categorySelect_counter].checked) {
			categorySelect_choice = categorySelect_choice + 1; 
		}
	}
	if (categorySelect_choice > 15) {
		msg="You're limited to only three selections for Question 4.1.\n"
		msg=msg + "You have made " + categorySelect_choice + " selections.\n"
		msg=msg + "Please remove " + (categorySelect_choice-4) + " selection(s)."
		alert(msg)
		return (false);
	}
	if (categorySelect_choice < 1) {
		alert("please choose at least one category.");
		document.recipeForm.recipeTitle.focus();
		return (false);
	}
	if(document.recipeForm.recipeIngredients.value == "") {
		alert("recipe ingredients are required.");
		document.recipeForm.recipeIngredients.focus();
	return (false);
	}
	if(document.recipeForm.recipeInstructions.value == "") {
		alert("recipe instructions are required.");
		document.recipeForm.recipeInstructions.focus();
	return (false);
	}
	if(document.recipeForm.recipeOwner.value == "") {
		alert("please sign your recipe.");
		document.recipeForm.recipeOwner.focus();
	return (false);
	}
	//if(document.recipeForm.recipeAddress.value == "") {
	//	alert("please include your address.");
	//	document.recipeForm.recipeAddress.focus();
	//return (false);
	//}
	//if(document.recipeForm.recipeCity.value == "") {
	//	alert("please include your city.");
	//	document.recipeForm.recipeCity.focus();
	//return (false);
	//}
	//if(document.recipeForm.recipeState.value == "") {
	//	alert("please include your state.");
	//	document.recipeForm.recipeState.focus();
	//return (false);
	//}
	//if(document.recipeForm.recipeZipcode.value == "") {
	//	alert("please include your zipcode.");
	//	document.recipeForm.recipeZipcode.focus();
	//return (false);
	//}
	//if(document.recipeForm.recipeTelephone.value == "") {
	//	alert("please include your phone number.");
	//	document.recipeForm.recipeTelephone.focus();
	//return (false);
	//}
	//if(document.recipeForm.recipeEmail.value == "") {
	//	alert("please include your email address.");
	//	document.recipeForm.recipeEmail.focus();
	//return (false);
	//}
return (true);
}