/**
 * DHTML date validation script for dd/mm/yyyy
 */
// 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 strDay=dtStr.substring(0,pos1)
	var strMonth=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 : dd/mm/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
	}
}
	//END OF DATE CHECKING
	
function isValidEmail(str) {
   return (str.indexOf(".") > 2) && (str.indexOf("@") > 0);
}

function ValidateForm(){
var invalid = " ";

	if (document.AddUser.FirstName.value == "")
		{
		alert ("You must enter a first name.")
		document.AddUser.FirstName.focus();
		return false;
		}
	
	if (document.AddUser.Surname.value == "")
		{
		alert ("You must enter a last name.")
		document.AddUser.Surname.focus();
		return false;
		}
	
	if (document.AddUser.Street.value == "")
		{
		alert ("You must enter a street address.")
		document.AddUser.Street.focus();
		return false;
		}
	
	if (document.AddUser.City.value == "")
		{
		alert ("You must enter a city.")
		document.AddUser.City.focus();
		return false;
		}
	if (document.AddUser.PostCode.value == "")
		{
		alert ("You must enter a Post Code.")
		document.AddUser.PostCode.focus();
		return false;
		}
	if(document.AddUser.Country.options[document.AddUser.Country.selectedIndex].value == "")
	{alert("You must selected a Country.");
	return false;
	}
	var dt=document.AddUser.DOB;
	if (isDate(dt.value)==false){
		dt.focus();
		return false;
	}
	if (document.AddUser.UserName.value == "")
		{
		alert ("You must enter a user name.")
		document.AddUser.UserName.focus();
		return false;
		}
	if(document.AddUser.Pwd.value=="")
		{alert("You must enter a password.");
		return false;
		}
	if (document.AddUser.UserName.value.indexOf(invalid) > -1) {
		alert("Sorry, spaces are not allowed in the Username.");
		return false;
	}
	if (document.AddUser.Pwd.value.indexOf(invalid) > -1) {
		alert("Sorry, spaces are not allowed in the password.");
		return false;
	}
	if (document.AddUser.UserName.value.length < 4)
    	{alert("Please enter a username with at least 4 characters.")
      	return false;
	}

 	 if (document.AddUser.Pwd.value.length < 5)
	 	{alert("Please enter at least 5 characters for your password.")
  		return false;
	}

	if(document.AddUser.PwdConfirm.value=="")
		{alert("You must re-type your password to confirm it.");
		return false;
		}
	if(document.AddUser.Pwd.value!=document.AddUser.PwdConfirm.value)
		{alert("The two passwords supplied do not match");
		return false;
		}
	if (!isValidEmail(document.AddUser.Email.value)) 
   	{alert('Invalid E-mail Address! Please re-enter.') 
	  document.AddUser.Email.focus();
      return false; 
      } 
	if(document.AddUser.conds[1].checked)
		{
		alert("You must accept the terms and conditions before proceeding.")
		return false;
		}
	
    return true;
 }