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 validate_people()
{
    valid = true;
	var dt=document.People;
	var strEmail = dt.Email.value;
	var strPhone = dt.CellPhone.value;

	var strEmailRegExp = /^[_a-zA-Z0-9-]+(\.[_a-zA-Z0-9-]+)*@[a-zA-Z0-9-]+(\.[a-zA-Z0-9-]+)*\.(([0-9]{1,3})|([a-zA-Z]{2,3})|(aero|coop|info|museum|name))$/;
	var strPhoneRegExp = /^(?:\([2-9]\d{2}\)?|[2-9]\d{2}(?:\-?|\ ?))[- \.]?[2-9]\d{2}[- \.]?\d{4}(\s(x\d+)?){0,1}$/;

// Check for all required fields have been filled

	if (dt.FirstName.value == "") {
		alert ("Please enter first name.");
    	dt.FirstName.focus();
    	valid = false;

	} else if (dt.LastName.value == "") {
		alert ("Please enter last name.");
    	dt.LastName.focus();
    	valid = false;

  	} else if (dt.Category.value == "Default") {
		alert ("Please select a category before continuing.");
		dt.Category.focus();
        valid = false;

	} else if (dt.Status.value == "Default") {
		alert ("Please select a status before continuing.");
		dt.Status.focus();
		valid = false;

   	} else if (dt.StreetAddress.value == "") {
		alert ("Please enter a street address.");
    	dt.StreetAddress.focus();
  		valid = false;

   	} else if (dt.City.value == "") {
		alert ("Please enter a city.");
    	dt.City.focus();
    	valid = false;

   	} else if (dt.State.value == "") {
		alert ("Please enter a state.");
    	dt.State.focus();
    	valid = false;

   	} else if (dt.ZipCode.value == "") {
		alert ("Please enter a zip code.");
    	dt.ZipCode.focus();
    	valid = false;

	} else if (dt.HomePhone.value == "") {
		alert ("Please enter a home phone number.");
	  	dt.HomePhone.focus();
    	valid = false;
    	
     } else if (dt.HomePhone.value.length != 10) {
	 	alert("Phone length must contain ten (10) numbers.");
	   	dt.HomePhone.focus();
 		valid = false;

 	 } else if (isInteger(dt.HomePhone.value) == false) {
		alert ("Please enter a valid phone number without parenthesis and dashes for this agency.");
    	dt.HomePhone.focus();
    	valid = false;

	} else if (dt.CellPhone.value == "") {
		alert ("Please enter a cell phone number.");
	  	dt.CellPhone.focus();
    	valid = false;
    	
     } else if (dt.CellPhone.value.length != 10) {
	 	alert("Phone length must contain ten (10) numbers.");
	   	dt.CellPhone.focus();
 		valid = false;

 	 } else if (isInteger(dt.CellPhone.value) == false) {
		alert ("Please enter a valid phone number without parenthesis and dashes for this agency.");
    	dt.CellPhone.focus();
    	valid = false;

	} else if (dt.Email.value == "") {
		alert ("Please enter an email address.");
	  	dt.Email.focus();
    	valid = false;

    } else if (!dt.Email.value.match(strEmailRegExp)) {
		alert("Please enter valid email address.");
		dt.Email.focus();
		valid = false;

// Check for fields for different categories

// Applicant


// Partner
    } else if (dt.Category.value == "Applicant") {
    	if (dt.Company.value == "") {
    		alert ("Please enter a company.");
    		dt.Company.focus();
    		valid = false;
    	}
    	else if (dt.CompanyTitle.value == "") {
    		alert ("Please enter a company title.");
    		dt.CompanyTitle.focus();
    		valid = false;
    	}



// Primary Funder
    } else if (dt.Category.value == "PrimaryFunder") {
    	if (dt.Company.value == "") {
    		alert ("Please enter a company.");
    		dt.Company.focus();
    		valid = false;
    	}
    	else if (dt.CompanyTitle.value == "") {
    		alert ("Please enter a company title.");
    		dt.CompanyTitle.focus();
    		valid = false;
    	}



// Staff
    } else if (dt.Category.value == "Staff") {
    	if (dt.Title.value == "") {
    		alert ("Please enter a title.");
    		dt.Title.focus();
    		valid = false;
    	}
    	else if (dt.StaffRank.value == "") {
    		alert ("Please enter a rank.");
    		dt.StaffRank.focus();
    		valid = false;
    	}
    	else if (isInteger(dt.StaffRank.value) == false) {
			alert ("Please enter a valid rank.");
	    	dt.StaffRank.focus();
	    	valid = false;
	    }


// Testimonial


// Volunteer
    } else if (dt.Category.value == "Volunteer") {
    	if (dt.HoursMonth.value == "") {
    		alert ("Please enter an amount of hours per month.");
    		dt.HoursMonth.focus();
    		valid = false;
    	}
    	else if (isInteger(dt.HoursMonth.value) == false) {
			alert ("Please enter a valid hours per month.");
	    	dt.HoursMonth.focus();
	    	valid = false;
	    }
	}


return valid;
}

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