function swmap(arr, func)
{
	var newarr = new Array(arr.length);
	for (var i=0; i<arr.length; i++) {
		newarr[i] = func(arr[i], i, i==0, i==(arr.length-1))
	}
	return newarr;
}

function swreduce(arr, func)
{
	var newarr = [];
	for (var i=0; i<arr.length; i++) {
		if (func(arr[i], i, i==0, i==(arr.length-1))) newarr[newarr.length] = arr[i];
	}
	return newarr;
}

function swscrolly()
{
    var scrollY = 0;

    if ( document.documentElement && document.documentElement.scrollTop ){
        scrollY = document.documentElement.scrollTop;
    }else if ( document.body && document.body.scrollTop ){
        scrollY = document.body.scrollTop;
    }else if ( window.pageYOffset ){
        scrollY = window.pageYOffset;
    }else if ( window.scrollY ){
        scrollY = window.scrollY;
    }

    return scrollY;
}


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 IsNumeric (number,isfloat) {
	var numvar;
	
	if (isfloat) {
		numvar = parseFloat(number);
	}
	else {
		numvar = parseInt(number, 10);
	}
	
//	alert('numvar = ' + numvar);
//	alert('number = ' + number);
//	alert(numvar == number);
	
	if (numvar == 'NaN' || numvar != number) {
		return false;
	}
	
	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
	}
return true
}

var keybNumericNM = new keybEdit('01234567890');
var keybDecimalNM = new keybEdit('01234567890.');
var keybDateNM = new keybEdit('01234567890/');
var keybEmailNM = new keybEdit('abcdefghijklmnopqurstuvwxyz01234567890.@-_+=?^{}~');

function keybEdit(strValid, strMsg) {

	var reWork = new RegExp('[a-z]','gi');		//	Regular expression\


	if(reWork.test(strValid))
		this.valid = strValid.toLowerCase() + strValid.toUpperCase();
	else
		this.valid = strValid;


	this.message = '';

	this.getValid = keybEditGetValid;
	this.getMessage = keybEditGetMessage;
	
	function keybEditGetValid() {
		return this.valid.toString();
	}
	
	function keybEditGetMessage() {
		return this.message;
	}
}


void function editKeyBoard(objForm, objKeyb) {

	strWork = objKeyb.getValid();
	strMsg = '';						// Error message
	blnValidChar = false;					// Valid character flag

	if(!blnValidChar)
		for(i=0;i < strWork.length;i++)
			if(window.event.keyCode == strWork.charCodeAt(i)) {
				blnValidChar = true;

				break;
			}

	if(!blnValidChar) {
		if(objKeyb.getMessage().toString().length != 0)
			alert('Error: ' + objKeyb.getMessage());

		window.event.returnValue = false;		// Clear invalid character
		objForm.focus();				// Set focus
	}
}




function nrValOpt( elementid, fieldname ) {
    var formname = document.getElementById(elementid);
		
	if ( formname.selectedIndex == 0 ) {
        formname.focus();
	    alert('Please complete the "' + fieldname + '" field.');
		
        return false;
	}
}

function nrValNum( elementid, fieldname, required, dec ) {
   
   
   var formname = document.getElementById(elementid);
	var CurrentValue = formname.value;
	
	CurrentValue = trim(CurrentValue);
	formname.value = CurrentValue;
	if ( required && CurrentValue.length < 1 ) {
        formname.focus();
	    alert('Please complete the "' + fieldname + '" field.');
		
        return false;
	}
	
	
	
	if ( CurrentValue.length > 0 ) {

		if ( IsNumeric(CurrentValue,dec) == false ) {
		
			formname.focus();
			alert('Please enter a valid number for the field "' + fieldname + '".');		
			return false;					
		}
	}

	return true;
}

function nrValDat( elementid, fieldname, required ) {
    var formname = document.getElementById(elementid);
	var CurrentValue = formname.value;

	CurrentValue = trim(CurrentValue);
	formname.value = CurrentValue;
	if ( required && CurrentValue.length < 1 ) {
        formname.focus();
	    alert('Please complete the "' + fieldname + '" field.');		
        return false;
	}
	if ( CurrentValue.length > 0 ) {
		var dtStr = CurrentValue;
		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){
			formname.focus();
			alert("The date format for " + fieldname + " should be : dd/mm/yyyy")
			return false
		}
		if (strMonth.length<1 || month<1 || month>12){
			formname.focus();
			alert("Please enter a valid month for " + fieldname )
			return false
		}
		if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
			formname.focus();
			alert("Please enter a valid day for " + fieldname )
			return false
		}
		if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
			formname.focus();
			alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear+ " for " + fieldname )
			return false
		}
		if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
			formname.focus();
			alert("Please enter a valid date for " + fieldname )
			return false
		}
	}
	return true;
}

function trim(value)
{

	while (value.substring(0,1) == ' ')
	{
	value = value.substring(1, value.length);
	}
	while (value.substring(value.length-1, value.length) == ' ')
	{
	value = value.substring(0,value.length-1);
	}
	return value;
}

function nrValTxt( elementid, fieldname, minlen, maxlen ) {
    var formname = document.getElementById(elementid);
	var CurrentValue = formname.value;
	
	CurrentValue = trim(CurrentValue);
	formname.value = CurrentValue;
	
	if (minlen > 0) {	
		if ( CurrentValue.length < 1) {
			formname.focus();
			alert('Please complete the "' + fieldname + '" field.');
		
			return false;
		} 
	
		if ( CurrentValue.length < minlen ) {
			formname.focus();
			alert('The "' + fieldname + '" field must be at least ' + minlen + ' characters long.');		
			return false;
		} 
	}
	
	if ( maxlen > 0 ) {	
		if ( CurrentValue.length > maxlen ) {
			formname.focus();
			alert('The "' + fieldname + '" field must be no more than ' + maxlen + ' characters long.');		
			return false;
		} 
	}
}


function nrValSel( elementid, fieldname, minitems, maxitems ) {
   
    
   
    var formname = document.getElementById(elementid);
    var numSelected = 0;
    
    
	for ( i=0; i<formname.options.length ; i++ ) {
		if ( formname.options[i].selected ) {		    
		    if(formname.options[i].value != 0) numSelected++;
		}
	}

	if( minitems > 0 ) {
	    if ( numSelected < 1) {
			formname.focus();
			alert('Please select a "' + fieldname + '".');
			return false;
		} 
	
		if ( numSelected < minitems ) {
			formname.focus();
			alert('Please select at least ' + minitems + ' items from "' + fieldname + '".');		
			return false;
		} 
	} 
	
	if( maxitems > 0 ) {
		if ( numSelected > maxitems ) {
			formname.focus();
			alert('Please select no more than ' + maxitems + ' items from "' + fieldname + '".');		
			return false;
		} 
	} 
		
	return true;
}


function nrValEml(elementid, fieldname, required, maxlen )
{
	var objField = document.getElementById(elementid)
	if (required == true) {
		if (objField.value.length < 1) {
			objField.focus();
			alert('Please complete the "' + fieldname + '" field.');
			return false;
		}
	}
	
	if (objField.value.length > 0) {
		
		// split the entered string at the @ sign, if 
		// there aren't at least 2 array elements created
		// no @ sign was entered so therefore it is an
		// invalid email address so return false.
		string = objField.value;
		check_for_at = string.split("@");
		
		if ( ! check_for_at[0] || ! check_for_at[1] ) {
			objField.focus();
			alert(fieldname + ' must be a valid email address1');
			return false;
		} else {
			
			// If there is a valid @ sign, split the second 
			// half of the string by the first dot.  If 
			// there aren't at least 2 array elements created
			// no . was entered so therefore it is an
			// invalid email address so return false.
			check_for_dot = check_for_at[1].split(".");
			if ( ! check_for_dot[0] || ! check_for_dot[1] ) {
				objField.focus();
				alert(fieldname + ' must be a valid email address2');
				return false;
			}
		}

		var re = / |;/;
		if ((/[ ;]/).exec(objField.value) != null) {
			objField.focus();
			alert(fieldname + ' must be a valid email address3');
			return false;
		}
	}

	return true;
}