function validate_required(field,alerttxt)
{
with (field)
{
if (value==null||value=="")
  {alert(alerttxt);return false;}
else {return true}
}
}

function validate_form(thisform)
{
with (thisform)
{

//VALIDATE - REQUESTOR INFORMATION
if (validate_required(prefix,"Please select a prefix")==false){prefix.focus();return false;} else
if (validate_required(fname,"Please enter your first name")==false){fname.focus();return false;} else
if (validate_required(lname,"Please enter your last name")==false){lname.focus();return false;} else
if (validate_required(organization,"Please enter the name of your organization")==false){organization.focus();return false;} else
if (validate_required(wphone,"Please enter your work phone number")==false){wphone.focus();return false;} else
if (checkInternationalPhone(wphone.value)==false){alert("Please Enter a Valid Work Phone Number");wphone.value="";wphone.focus();return false;} else
if (validate_required(cphone,"Please enter your cell phone number")==false){cphone.focus();return false;} else
if (checkInternationalPhone(cphone.value)==false){alert("Please Enter a Valid Cell Phone Number");cphone.value="";cphone.focus();return false;} else
if (validate_required(emailaddress,"Please enter your email address")==false){emailaddress.focus();return false;} else
if (echeck(emailaddress.value)==false){emailaddress.focus();return false;} else
//VALIDATE - EVENT INFORMATION
if (validate_required(nameevent,"Please enter the name of the event")==false){nameevent.focus();return false;} else
if (validate_required(overview,"Please provide an overview of the event")==false){overview.focus();return false;} else
if (validate_required(eventdate,"Please provide the date of the event")==false){eventdate.focus();return false;} else
if (isDate(eventdate.value)==false){eventdate.focus();return false;} else
if (validate_required(day,"Please select the day of the week for this event")==false){day.focus();return false;} else
if (validate_required(begintime,"Please enter the begin time for this event")==false){begintime.focus();return false;} else
if (validate_required(endtime,"Please enter the end time for this event")==false){endtime.focus();return false;} else
if (validate_required(timezone,"Please enter the time zone for this event")==false){timezone.focus();return false;} else
//VALIDATE - REQUESTED CDFI FUND INFORMATION
if (validate_required(reqstaffmember,"Please enter the requested CDFI Fund staff member")==false){reqstaffmember.focus();return false;} else
if (validate_required(speechtopic,"Please enter the requested speech topic")==false){speechtopic.focus();return false;} else
if (validate_required(speakingtime,"Please enter a requested speaking time")==false){speakingtime.focus();return false;} else
if (validate_required(speechlength,"Please select the preferred speech length")==false){speechlength.focus();return false;} else
if (validate_required(bio,"Please select the speaker bio request")==false){bio.focus();return false;} else
//VALIDATE - EVENT DETAILS
if (validate_required(facility,"Please enter the name of the facility")==false){facility.focus();return false;} else
if (validate_required(facilityaddress,"Please enter the facility address")==false){facilityaddress.focus();return false;} else
if (validate_required(city,"Please enter the event city")==false){city.focus();return false;} else
if (validate_required(state,"Please enter the event state")==false){state.focus();return false;} else
if (validate_required(environment,"Please select the type of envirionment")==false){environment.focus();return false;} else
if (validate_required(host,"Please enter the hosting group for this event")==false){host.focus();return false;} else
if (validate_required(contact1,"Please enter a contact person for this event")==false){contact1.focus();return false;} else
if (validate_required(contact2,"Please enter a second contact person for this event")==false){contact2.focus();return false;} else
//VALIDATE - ATTENDANCE
if (validate_required(introperson,"Please enter the name of the person who will be introduciing the speaker")==false){introperson.focus();return false;} else
if (validate_required(attending,"Please enter any attending organizations and officials")==false){attending.focus();return false;} else
if (validate_required(estimate,"Please enter the estimated attendance")==false){estimate.focus();return false;} else
if (validate_required(openpublic,"Please select whether this event is open to the public")==false){openpublic.focus();return false;} else
if (validate_required(openpress,"Please whether this event is open to the press")==false){openpress.focus();return false;} else
if (validate_required(media,"Please select whether media will be attending")==false){media.focus();return false;} 
}
}

//PHONE NUMBER VALIDATION CHECKER
//NOTE THIS USES SOME FUNCTIONS IN THE DATE VALIDATION CHECKER BELOW
// Declaring required variables
var digits = "0123456789";
// non-digit characters which are allowed in phone numbers
var phoneNumberDelimiters = "()- ";
// characters which are allowed in international phone numbers
// (a leading + is OK)
var validWorldPhoneChars = phoneNumberDelimiters + "+";
// Minimum no of digits in an international phone no.
var minDigitsInIPhoneNumber = 10;

function trim(s)
{   var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not a whitespace, append to returnString.
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character isn't whitespace.
        var c = s.charAt(i);
        if (c != " ") returnString += c;
    }
    return returnString;
}

function checkInternationalPhone(strPhone){
    var bracket=3
        strPhone=trim(strPhone)
    if(strPhone.indexOf("+")>1) return false
    if(strPhone.indexOf("-")!=-1)bracket=bracket+1
    if(strPhone.indexOf("(")!=-1 && strPhone.indexOf("(")>bracket)return false
    var brchr=strPhone.indexOf("(")
    if(strPhone.indexOf("(")!=-1 && strPhone.charAt(brchr+2)!=")")return false
    if(strPhone.indexOf("(")==-1 && strPhone.indexOf(")")!=-1)return false
        s=stripCharsInBag(strPhone,validWorldPhoneChars);
    return (isInteger(s) && s.length >= minDigitsInIPhoneNumber);
}

//EMAIL VALIDATION CHECKER
function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   alert("Invalid E-mail Address")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Invalid E-mail Address")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Invalid E-mail Address")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Invalid E-mail Address")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Invalid E-mail Address")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Invalid E-mail Address")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Invalid E-mail Address")
		    return false
		 }

 		 //return true					
	}

// DATE VALIDATION CHECKER
// 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(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
}