// set variable and regular expression for email validation

var valid = "0123456789-";
var hyphencount = 0;
var re

//date validation
var dtCh= "/";
var minYear=2003;
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
}
//end date validation





//email validation
function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str == ""){
			return true
			}
		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					
	}

// check for integer

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;
}


// check email validity

function validateForm(myForm) {


if (myForm.title.value == ""){

	alert("Please enter an event title");
	
	myForm.title.focus()
	
	return false

}

if(myForm.startdate.value == ""){

	alert("Please enter a Start Date");
	
	myForm.startdate.focus()
	
	return false
	
}

/*var sday=myForm.startdate.substring(0,1)
var smonth=myForm.startdate.substring(3,4)
var syear=myForm.startdate.substring(6,9)
*/
var sdt=myForm.startdate
	if (isDate(sdt.value)==false){
		sdt.focus()
		return false
	}


	
if(myForm.enddate.value == ""){

	alert("Please enter an End Date");
	
	myForm.enddate.focus()
	
	return false
	
}

var edt=myForm.enddate
if (isDate(edt.value)==false){
	edt.focus()
	return false
}

var smonth=myForm.startdate.value.substring(0,2)
var sday=myForm.startdate.value.substring(3,5)
var syear=myForm.startdate.value.substring(6,10)

var emonth=myForm.enddate.value.substring(0,2)
var eday=myForm.enddate.value.substring(3,5)
var eyear=myForm.enddate.value.substring(6,10)

var sdate = syear + smonth + sday
var edate = eyear + emonth + eday

/*if((smonth != "04") || (syear != "2003")){

	alert("Please enter a start date between 04/07/2003 and 04/13/2003.")
	
	return false;
	
	}

if((emonth != "04") || (eyear != "2003")){

	alert("Please enter an end date between 04/07/2003 and 04/13/2003.")
	
	return false;
	
	}
	
*/
if (sdate > edate){
	alert("The End Date must be greater than or equal to the Start Date")
	myForm.startdate.focus()
	return false;
}


if (myForm.location.value == ""){

	alert("Please enter an event location")
	
	myForm.location.focus()
	
	return false

}

if (myForm.address1.value == ""){

	alert("Please enter a address for the event")
	
	myForm.address1.focus()
	
	return false

}

if (myForm.city.value == ""){

	alert("Please enter an event city")
	
	myForm.city.focus()
	
	return false

}

if (myForm.state.options[myForm.state.selectedIndex].value == ""){

	alert("Please enter an event state") 
	myForm.state.focus()
	return false

} 

if (myForm.description.value == ""){

	alert("Please enter a Description") 
	myForm.description.focus()
	return false

}

if (myForm.contact.value == "") {

	alert("Please enter a contact name")
	
	myForm.contact.focus()
	
	return false

}

if (myForm.phone.value == ""){

	alert("Please enter a contact phone number")
	
	myForm.phone.focus()
	
	return false

}

if ((myForm.phone.value != "") && (myForm.phone.value.length != 10)){

	alert("Please include exactly ten digits in the phone number")
	
	myForm.phone.focus()
	
	return false
	
}

if (! isInteger(myForm.phone.value)) {

	alert("Phone numbers must contain numbers")
	
	myForm.phone.focus()
	
	return false

}

if (myForm.email.value == ""){

	alert("Please enter an email address")
	
	myForm.email.focus()
	
	return false

}

var email=document.myForm.email
	if (echeck(email.value)==false){
		email.focus()
		return false
	}
	
	return true
	
}