// Helper Functions
// Get and Set Element Properties (Client-Side) /////////////////////////
    function GetMyElement(ele)
    {
        try
        {
            var e = document.getElementById(ele).value;
            return e;
        }
        catch(e)
        {
            return "";
        }
    }
    
    function SetMyElement(ele, val)
    {
        try
        {
            var e = document.getElementById(ele);
            e.value = val;
        }
        catch(e)
        {
            return "";
        }
    }

	function GetMyHTML(ele)
    {
        try
        {
            var e = document.getElementById(ele);
            return e.innerHTML;
        }
        catch(e)
        {
            return "";
        }
    }
	
    function SetMyHTML(ele, val)
    {
        try
        {
            var e = document.getElementById(ele);
            e.innerHTML = val;
        }
        catch(e)
        {
            return "";
        }
    }

// Submit Form
    function Validate()
	{
		var vc = true;
		var err_txt = "<hr><div style='text-align:left'><b>Form Validation ::</b></div>";
		var err = document.getElementById("ErrText");
		err.innerHTML = "<ul>";
			
			if(GetMyElement('FullName') == "")
			{
				err_txt += "<li>Please enter your full name...</li>";
				vc = false;
			}
			
			if(GetMyElement('Age') == "")
			{
				err_txt += "<li>Please enter your birthday...</li>";
				vc = false;
			}
			
			if(GetMyElement('Email') == "")
			{
				err_txt += "<li>Please enter your email address...</li>";
				vc = false;
			}
			
			err.innerHTML = err_txt + "</ul>";
			
		return vc;
	}
	
	function JoinClub()
	{
	    var name = GetMyElement("FullName");
	    var age = GetMyElement("Age");
	    var email = GetMyElement("Email");
	    
	    if(Validate())
	    {
	        Club.AddElement(name, age, email, JoinCallback);
	    }
	}
	
	function JoinCallback(res)
	{
	    //alert(res.value);
		var ret = res.value;
        var err = document.getElementById("ErrText");
        var content = document.getElementById("content");
        
		if(res.value == null || res.error != null)
		{
			err.innerHTML = res.error.Message;
		}
		else
		{
			var retval = ret.split("|");
			if(retval[0] == 0)
			{
				content.innerHTML = "<h2>" + retval[1] + "</h2>";
			}
			else
			{
				err.innerHTML = retval[1];
			}
		}
	}
	
	//////////////////////////////////////////////////////////////////////////////////////////
//Date Validate Functions
// Date Vaidate Function (mm/dd/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 CheckValidDate(dtStr, dtField){
	
	if(dtStr.length == 0)
	{
		return true;
	}
	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");
		dtField.value = "";
		return false;
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Please enter a valid month");
		dtField.value = "";
		return false;
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Please enter a valid day");
		dtField.value = "";
		return false;
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear);
		dtField.value = "";
		return false;
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date");
		dtField.value = "";
		return false;
	}
return true;
}