function IsDigit(o,e) {
	if (!e) var e = window.event
	if (e.keyCode) code = e.keyCode;
	else if (e.which) code = e.which;
	if (((code < 48)||(code > 57 ))) 
	{
		if (code != 8 && code != 46 && code != 9 && code != 32 && code != 45 && code != 40 && code != 41)
		{
			return false;
		}
	}
}
function IsDigitForQty(o,e) {
	if (!e) var e = window.event
	if (e.keyCode) code = e.keyCode;
	else if (e.which) code = e.which;
	if (((code < 48)||(code > 57 ))) 
	{		
		return false;	
	}
}
function checkDigit(objParam)
{
	var str = document.getElementById(objParam).value;
	var str1 = "";
	for (i = 0 ;i <= str.length ;i++ )
	{
		for (j = 0; j < 10 ;j++ )
		{
			if (str.charAt(i) == j)
			{
				str1 = str1 + str.charAt(i);
			}
		}
	}
	document.getElementById(objParam).value = str1;
	
}
function Trim(inputString)
{
	var retValue = inputString;
	var ch = retValue.substring(0, 1);

	while (ch == " ")
	{ // Check for space at the start of the string
		retValue = retValue.substring(1, retValue.length);
		ch = retValue.substring(0, 1);
	}

	ch = retValue.substring(retValue.length-1, retValue.length);

	while (ch == " ")
	{ // Check for spaces at the end of the string
		retValue = retValue.substring(0, retValue.length-1);
		ch = retValue.substring(retValue.length-1, retValue.length);
	}	
	return retValue;
}

function IsEmpty(v){
	varValue = Trim(v);
	if (varValue.length == 0){ return true; }else{ return false; }
}
var bugchars = '!#$^&*()+|}{[]?><~%:;/,=`"\'';
function CharsInBag(s)
{  
	var i;
	var lchar="";
    // Search through string's characters one by one.
    // If character is not in bag.
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character isn't whitespace.
        var c = s.charAt(i);
		if(i>0)lchar=s.charAt(i-1)
        if (bugchars.indexOf(c) != -1 || (lchar=="." && c==".")) {
			return false;
		}
    }
    return true;
}
function isInteger(s)
{   var i;
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character is not a number.
        var c = s.charAt(i);
        if ((c < 0) && (c > 9) && (c != ".")) return false;
    }
    // All characters are numbers.
    return true;
}
function echeck(str) {
	var at="@"
	var dot="."
	var lat=str.indexOf(at)
	var lstr=str.length
	var ldot=str.indexOf(dot)
	var lastdot=str.lastIndexOf(dot)
	if (str.indexOf(at)==-1){
	   return false
	}
	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
	   return false
	}
	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr || str.substring(lastdot+1)==""){
		return false
	}
	 
	 if (str.indexOf(at,(lat+1))!=-1){
		return false
	 }

	 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		return false
	 }

	 if (str.indexOf(dot,(lat+2))==-1){
		return false
	 }
	
	 if (str.indexOf(" ")!=-1){
		return false
	 }
	if(CharsInBag(str)==false){
		return false
	 }
	 var arrEmail=str.split("@")
	 var ldot=arrEmail[1].indexOf(".")
	 if(isInteger(arrEmail[1].substring(ldot+1))==false){
		return false
	 }
	 return true				
}


function IsValidEmail(str){
	var at = '@';
	var dot = '.';
	var lat = parseInt(str.indexOf(at));
	var ldot = parseInt(str.lastIndexOf(dot));
	var lstr = parseInt(str.length);
	
	//no '@' or '@' is first character or '@' is the last character
	if ((lat <= 0) || (lat == parseInt(lstr-1)))
		return false;

	//no '.' or '.' is first character or '.' is the last character
	if ((ldot <= 0) || (ldot == parseInt(lstr-1)))
		return false;

	//presence of another '@'
	if (str.indexOf(at, parseInt(lat+1)) != -1) 
		return false;
	//presence of '.' before or after '@'
	if ((str.substr(parseInt(lat - 1), 1) == dot) || (str.substr(parseInt(lat + 1), 1) == dot))
		return false;

	//check '.' is at least one character after '@'
	if (str.indexOf(dot, parseInt(lat + 2)) == -1) 
		return false;

	//check for blank
	if (str.indexOf(" ") != -1) 
		return false;

	//check the length after the last '.' is not less than 2 characters
	if (str.substr(parseInt(ldot + 1)).length < 2) 
		return false;

	if (!IsAlphaNumeric(str.substr(ldot + 1)))
		return false;	
	
	return true;
}
function IsValidPassword(v){
	if (IsAlphaNumeric(v)) {
		if (v.length < 6) { return false; } else { return true; }
	} else { return false; }
}
function IsAlphaNumeric(str){
	for (i=0; i<str.length; i++){
		if (!((str.charCodeAt(i)>=97) && (str.charCodeAt(i)<=122)) && !((str.charCodeAt(i)>=65) && (str.charCodeAt(i)<=90)) && !((str.charCodeAt(i)>=48) && (str.charCodeAt(i)<=57))){
			return false;
		}
	}
	return true;
}

function IsDigitForMoney(o,e){
	if (!e) var e = window.event
	if (e.keyCode) code = e.keyCode;
	else if (e.which) code = e.which;
	if (((code < 48)||(code > 57 ))) 
	{
		if (code != 46)
		{
			return false;
		}
	}
}

function round_decimals(original_number, decimals) {
    var result1 = original_number * Math.pow(10, decimals)
    var result2 = Math.round(result1)
    var result3 = result2 / Math.pow(10, decimals)
    return pad_with_zeros(result3, decimals)
}

var dtCh= "/";
var minYear=1900;
var maxYear=2100;



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 clearText(objParam){
	document.getElementById(objParam).value = "";
}

function validate_join(){
	valid = true;
	if (IsEmpty(document.getElementById("name").value))
	{
		document.getElementById("lblname").innerHTML = "Fill in your name.";
		document.getElementById("name").focus();
		valid = false;
	}
	if (IsEmpty(document.getElementById("nric").value))
	{
		document.getElementById("lblnric").innerHTML = "Fill in your NRIC.";
		document.getElementById("nric").focus();
		valid = false;
	}
	if (IsEmpty(document.getElementById("age").value))
	{
		document.getElementById("lblage").innerHTML = "Fill in your age.";
		document.getElementById("age").focus();
		valid = false;
	}
	if (!document.getElementById("gender1").checked && !document.getElementById("gender2").checked)
	{
		document.getElementById("lblgender").innerHTML = "Select your gender.";
		document.getElementById("gender1").focus();
		valid = false;
	}
	if (IsEmpty(document.getElementById("nationality").value))
	{
		document.getElementById("lblnationality").innerHTML = "Fill in your nationality.";
		document.getElementById("nationality").focus();
		valid = false;
	}
	if (IsEmpty(document.getElementById("race").value))
	{
		document.getElementById("lblrace").innerHTML = "Fill in your race.";
		document.getElementById("race").focus();
		valid = false;
	}
	if (IsEmpty(document.getElementById("religion").value))
	{
		document.getElementById("lblreligion").innerHTML = "Fill in your religion.";
		document.getElementById("religion").focus();
		valid = false;
	}
	if (IsEmpty(document.getElementById("address1").value))
	{
		document.getElementById("lbladdress1").innerHTML = "Fill in your address.";
		document.getElementById("address1").focus();
		valid = false;
	}
	if (IsEmpty(document.getElementById("postal").value))
	{
		document.getElementById("lblpostal").innerHTML = "Fill in your postalcode.";
		document.getElementById("postal").focus();
		valid = false;
	}
	if (IsEmpty(document.getElementById("contact").value))
	{
		document.getElementById("lblcontact").innerHTML = "Fill in your contact no.";
		document.getElementById("contact").focus();
		valid = false;
	}
	if (IsEmpty(document.getElementById("email").value))
	{
		document.getElementById("lblemail").innerHTML = "Fill in your email.";
		document.getElementById("email").focus();
		valid = false;
	}
	if (IsEmpty(document.getElementById("email").value))
	{
		document.getElementById("lblemail").innerHTML = "Fill in valid email.";
		document.getElementById("email").focus();
		valid = false;
	}
	else
	{
		if (!IsValidEmail(document.getElementById("email").value))
		{
			document.getElementById("lblemail").innerHTML = "Fill in a valid email.";
			document.getElementById("email").focus();
			valid = false;
		}
	}
	if (IsEmpty(document.getElementById("hqa").value))
	{
		document.getElementById("lblhqa").innerHTML = "Select Highest Qualification Achieved.";
		document.getElementById("hqa").focus();
		valid = false;
	}
	if (IsEmpty(document.getElementById("tutorexp").value))
	{
		document.getElementById("lbltutorexp").innerHTML = "Fill in Tutoring Experience.";
		document.getElementById("tutorexp").focus();
		valid = false;
	}
	if (valid)
	{
		document.ff.action = "join_action.php";
		document.ff.submit();
	}
}
function validate_find(){
	valid = true;
	if (IsEmpty(document.getElementById("name").value))
	{
		document.getElementById("lblname").innerHTML = "Fill in your name.";
		document.getElementById("name").focus();
		valid = false;
	}
	if (IsEmpty(document.getElementById("address").value))
	{
		document.getElementById("lbladdress").innerHTML = "Fill in your address.";
		document.getElementById("address").focus();
		valid = false;
	}
	if (IsEmpty(document.getElementById("postal").value))
	{
		document.getElementById("lblpostal").innerHTML = "Fill in your postalcode.";
		document.getElementById("postal").focus();
		valid = false;
	}
	if (IsEmpty(document.getElementById("mobile").value))
	{
		document.getElementById("lblmobile").innerHTML = "Fill in your handphone no.";
		document.getElementById("mobile").focus();
		valid = false;
	}
	if (IsEmpty(document.getElementById("home").value))
	{
		document.getElementById("lblhome").innerHTML = "Fill in your home no.";
		document.getElementById("home").focus();
		valid = false;
	}
	if (IsEmpty(document.getElementById("email").value))
	{
		document.getElementById("lblemail").innerHTML = "Fill in your email address.";
		document.getElementById("email").focus();
		valid = false;
	}
	else
	{
		if (!IsValidEmail(document.getElementById("email").value))
		{
			document.getElementById("lblemail").innerHTML = "Fill in valid email address.";
			document.getElementById("email").focus();
			valid = false;
		}
	}
	if (IsEmpty(document.getElementById("studentlevel").value))
	{
		document.getElementById("lblstudentlevel").innerHTML = "Fill in student level.";
		document.getElementById("studentlevel").focus();
		valid = false;
	}
	if (IsEmpty(document.getElementById("subjects").value))
	{
		document.getElementById("lblsubjects").innerHTML = "Fill in subjects tutoring.";
		document.getElementById("subjects").focus();
		valid = false;
	}
	if (!document.getElementById("gender1").checked && !document.getElementById("gender2").checked && !document.getElementById("gender3").checked )
	{
		document.getElementById("lblgender").innerHTML = "Select Preferred Gender.";
		valid = false;
	}
	if (valid)
	{
		document.form1.action = "find_action.php";
		document.form1.submit();
	}
}