//---------------------------------------
// show/hide table row - langxangvn VinaCyber JSC 10/2006
//---------------------------------------
function showTableRow(idRow, bVisibility)
{
	if(navigator.appName.indexOf("Microsoft") > -1)
	{
		// neu la IE thi visibility la block
		var canSee = 'block';
	}
	else
	{
		// FF table-row
		var canSee = 'table-row';
	}

	if (document.getElementById && document.createTextNode)
	{
		var tr = document.getElementById(idRow);
		if (tr)
		{
			if(bVisibility == "true")
			{
				// block for IE
				// table-row for FF
				tr.style.display = canSee;
			}
			else if(bVisibility == "false")
			{
				tr.style.display = 'none';
			}
		}
	}
}

function isLegal(szCheck, szInvalid)
{
	// szInvalid cac ky tu dac biet
	for(var i = 0; i < szInvalid.length; i ++)
	{
		// co ky tu dac biet trong chuoi can check
		if(szCheck.indexOf(szInvalid.charAt(i)) >= 0 )
		{
			return false;
		}
    }
	return true;
}

function LTrim(iStr)
{
	if(!iStr)
		return iStr;
	else
		iStr = iStr.toString();
	while (iStr.charCodeAt(0) <= 32)
	{
		iStr = iStr.substr(1);
	}
	return iStr;
}

function RTrim(iStr)
{
	if(!iStr)
		return iStr;
	else
		iStr = iStr.toString();
	while (iStr.charCodeAt(iStr.length - 1) <= 32)
	{
		iStr = iStr.substr(0, iStr.length - 1);
	}
	return iStr;
}

function Trim(iStr)
{
	if(!iStr)
		return iStr;
	else
		iStr = iStr.toString();
	while (iStr.charCodeAt(0) <= 32)
	{
		iStr = iStr.substr(1);
	}

	while (iStr.charCodeAt(iStr.length - 1) <= 32)
	{
		iStr = iStr.substr(0, iStr.length - 1);
	}

	return iStr;
}

function Left(str, n)
{
	if(!str)
		return str;
	else
		str = str.toString();
	if (n <= 0)
	    return "";
	else if (n > String(str).length)
	    return str;
	else
	    return String(str).substring(0, n);
}

function Right(str, n)
{
	if(!str)
		return str;
	else
		str = str.toString();
    if (n <= 0)
       return "";
    else if (n > String(str).length)
       return str;
    else
    {
       var iLen = String(str).length;
       return String(str).substring(iLen, iLen - n);
    }
}

/*
	Author: Matt Kruse <matt@mattkruse.com>
	http://www.mattkruse.com/
*/
function isBlank(val) {
	if(!val) {
		return true;
	}

	for(var i = 0;i < val.length;i ++) {
		if ((val.charAt(i) != ' ')
				&& (val.charAt(i) != "\t")
				&& (val.charAt(i) != "\n")
				&&(val.charAt(i) != "\r")) {
			return false;
		}
	}
	return true;
}

function isInteger(val) {
	if (isBlank(val)) {
		return false;
	}

	for(var i = 0; i < val.length; i++) {
		if(!isDigit(val.charAt(i))) {
			return false;
		}
	}
	return true;
}

function isNumeric(val) {
	return(parseFloat(val, 10) == (val*1));
}

function isArray(obj) {
	return(typeof(obj.length) == "undefined") ? false : true;
}

function isDigit(num) {
	if (num.length > 1) {
		return false;
	}
	var string="1234567890";
	if (string.indexOf(num) != -1) {
		return true;
	}
	return false;
}

function setNullIfBlank(obj) {
	if(isBlank(obj.value)) {
		obj.value = "";
	}
}

function setFieldsToUpperCase() {
	for(var i = 0;i < arguments.length; i++) {
		arguments[i].value = arguments[i].value.toUpperCase();
	}
}
/* end JavascriptToolbox http://www.mattkruse.com/javascript */

function isLeapYear(year) {
	if(!isInteger(year))
		return false;
	return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);
}

function isDate(datestring) {
	var regex = /\b(0?[1-9]|[12][0-9]|3[01])[-\/.\\/](0?[1-9]|1[012])[-\/.\\/]((19|20)?[0-9]{2})\b/;
	var match = regex.exec(datestring);
	if(!match) {
		return false;
	}
	else {
		var day = parseInt(match[1]);
		var month = parseInt(match[2]);
		var year = parseInt(match[3]);
		if(year < 100)
			year = year + 2000;

		if ((month == 4 || month == 6 || month == 9 || month == 11) && day == 31) {
			return false;
		}
 		if (month == 2) {
			if (day > 29 || (day == 29 && !isLeapYear(year))) {
				return false;
			}
 		}
		return true;
	}
}

function isDateBefore(src, dst) {
	var srcDate, dstDate;
	var year, month, day;
	var regex = /\b(0?[1-9]|[12][0-9]|3[01])[-\/.\\/](0?[1-9]|1[012])[-\/.\\/]((19|20)?[0-9]{2})\b/;
	var match = regex.exec(src);
	if(!match) {
		return -1;
	} else {
		day = parseInt(match[1]);
		month = parseInt(match[2]);
		year = parseInt(match[3]);
		if(year < 100)
			year = year + 2000;
		srcDate = new Date(year, month - 1, day);
	}

	match = regex.exec(dst);
	if(!match) {
		return -1;
	} else {
		day = parseInt(match[1]);
		month = parseInt(match[2]);
		year = parseInt(match[3]);
		if(year < 100)
			year = year + 2000;
		dstDate = new Date(year, month - 1, day);
	}

	return (srcDate - dstDate) > 0 ? false : true;
}

function getSelectedOptionLabel(objSelect)
{
	if(objSelect) {
		arOptions = objSelect.getElementsByTagName("option");
		for(var i = 0; i < arOptions.length; i++) {
			if(arOptions[i].selected) {
				return arOptions[i].label;
			}
		}
	}
	return '';
}

function getSelectedOptionInnerHTML(objSelect)
{
	if(objSelect)
	{
		arOptions = objSelect.getElementsByTagName("option");
		for(var i = 0; i < arOptions.length; i++)
		{
			if(arOptions[i].selected)
			{
				return arOptions[i].innerHTML;
			}
		}
	}
	return '';
}

function getEnter(field, event)
{
	var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
	if (keyCode == 13)
	{
		return true;
	}
	else
		return false;
}

function getEscape(field, event)
{
	var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
	if (keyCode == 27)
	{
		return true;
	}
	else
		return false;
}

function raiseKeyEvent(keyCode, objTarget)
{
	var fireOn = document.getElementById(objTarget);
	// Neu co createEvent
	if(document.createEvent)
	{
		// Neu co KeyEvent (FireFox)
		if(window.KeyEvent)
		{
		  	var evObj = document.createEvent('KeyEvents');
		  	evObj.initKeyEvent('keypress', true, true, window, false, false, false, false, keyCode, 0);
		}
		// Khong ho tro KeyEvent, dung UIEvent thay the
		else
		{
		  	var evObj = document.createEvent('UIEvents');
		  	evObj.initUIEvent('keypress', true, true, window, 1);
		  	evObj.keyCode = keyCode;
		}
		fireOn.dispatchEvent(evObj);
	}
	// Neu co createEventObject (IE dung fireEvent)
	else if(document.createEventObject)
	{
		var evObj = document.createEventObject();
			evObj.ctrlKey = false;
			evObj.altKey = false;
			evObj.shiftKey = false;
			evObj.keyCode = keyCode;
	  	fireOn.fireEvent('onkeypress', evObj);
	}
}

function raiseEnterEvent(objTarget)
{
	raiseKeyEvent(13, objTarget);
}

var glErrorCount = 0;
var glErrorMsg = new Array();
var glHasFocus = false;
glErrorMsg[0] = "---- The following errors occured ----" + String.fromCharCode(10);

function checkField(type, field, message)
{
	var fieldvalue = Trim(field.value);
	var bAllValid = true;
	var bFlagDot  = false;

	// Blank error
	if (type == 'noblank')
	{
		if (fieldvalue == "")
	  	{
		  	glErrorCount ++;
			glErrorMsg[glErrorCount] = message + String.fromCharCode(10);
			if(glHasFocus == false)
			{
				glHasFocus = true;
				field.focus();
			}
  		}
	}
	// Kiem tra dien chi email
	else if(type == 'email')
	{
		if(!isEmail(fieldvalue))
		{
			glErrorCount ++;
			glErrorMsg[glErrorCount] = message + String.fromCharCode(10);
			if(glHasFocus == false)
			{
				glHasFocus = true;
				field.focus();
			}
		}
	}
	else if(type == 'username')
	{
		/* ^(([A-Za-z\d][A-Za-z\d_]+[a-zA-Z\d])|([a-zA-Z\d]+))$ */
		// neu co underscore thi khong nam dau hay cuoi username
		if (!fieldvalue.match(/^(([A-Za-z\d][A-Za-z\d_]+[a-zA-Z\d])|([a-zA-Z\d]+))$/))
		{
			glErrorCount ++;
			glErrorMsg[glErrorCount] = message + String.fromCharCode(10);
			if(glHasFocus == false)
			{
				glHasFocus = true;
				field.focus();
			}
		}
	}
	else if(type == 'captcha')
	{
		/* ^[A-Z0-9]{5}$ */
		if (!fieldvalue.match(/^[a-zA-Z0-9]{5}$/))
		{
			glErrorCount ++;
			glErrorMsg[glErrorCount] = message + String.fromCharCode(10);
			if(glHasFocus == false)
			{
				glHasFocus = true;
				field.focus();
			}
		}
	}
	else if(type == 'mobile')
	{
		/* ^((\(\+?\d{1,3}\))|(\+?\d{1,3}))*[.-\s]?\d{4}[.-\s]?\d+$	*/
		/* part 1: match (code) (+code) +code code voi code tu 1 den 3 so */
		/* co hay khong co phan cach space - hay . */
		/* tiep theo 4 chu so */
		/* co hay khong co phan cach space - hay . */
		if (!fieldvalue.match(/^((\(\+?84\)[\-\.\s]?)|(\+?84[\-\.\s]?)|(0))((9\d{2}[\-\.\s]?\d{6})|(9\d{1}[\-\.\s]?\d{7}))$/))
		{
			glErrorCount ++;
			glErrorMsg[glErrorCount] = message + String.fromCharCode(10);
			if(glHasFocus == false)
			{
				glHasFocus = true;
				field.focus();
			}
		}
	}
	else if(type == 'phone')
	{
		if (!fieldvalue.match(/^((\(\d{2,4}\)[\-\.\s]?)|(\d{2,4}[\-\.\s]?))?(\d{3}[\-\.\s]?\d{3,4})$/))
		{
			glErrorCount ++;
			glErrorMsg[glErrorCount] = message + String.fromCharCode(10);
			if(glHasFocus == false)
			{
				glHasFocus = true;
				field.focus();
			}
		}
	}
	else
	{

	}
}


function sniffBrowsers() {
    d = document;
    this.agt = navigator.userAgent.toLowerCase();
    this.major = parseInt(navigator.appVersion);
    this.dom = (d.getElementById) ? 1 : 0; // true for ie6, ns6
    this.ns = (d.layers);
    this.ns4up = (this.ns && this.major >= 4);
    this.ns6 = (this.dom&&navigator.appName == "Netscape");
    this.op = (window.opera ? 1 : 0);
    this.op5 = (navigator.userAgent.indexOf("Opera 5") != -1) || (navigator.userAgent.indexOf("Opera/5") != -1);
    this.op6 = (navigator.userAgent.indexOf("Opera 6") != -1) || (navigator.userAgent.indexOf("Opera/6") != -1);
    this.ie = (d.all);
    this.ie4 = (d.all && !this.dom) ? 1 : 0;
    this.ie4up = (this.ie && this.major >= 4);
    this.ie5 = (d.all && this.dom);
    this.win = ((this.agt.indexOf("win") != -1) || (this.agt.indexOf("16bit") != -1));
    this.mac = (this.agt.indexOf("mac") != -1);
}

var objBrowser = new sniffBrowsers();
/* end determine browser */

function getStyleObject(objectId) {
    if(document.getElementById && document.getElementById(objectId)) {
    	return document.getElementById(objectId).style;
    } else if (document.all && document.all(objectId)) {
    	return document.all(objectId).style;
    } else if (document.layers && document.layers[objectId]) {
        return getObjNN4(document,objectId);
    } else {
    	return false;
    }
}

function changeObjectVisibility(objectId, newVisibility) {
    var styleObject = getStyleObject(objectId, document);
    if(styleObject) {
    	styleObject.visibility = newVisibility;
    	return true;
    } else {
  	  return false;
    }
}

function findImage(name, doc) {
    var i, img;
    for (i = 0; i < doc.images.length; i++) {
        if (doc.images[i].name == name) {
	        return doc.images[i];
        }
    }
    for (i = 0; i < doc.layers.length; i++) {
        if ((img = findImage(name, doc.layers[i].document)) != null) {
	        img.container = doc.layers[i];
	        return img;
        }
    }
    return null;
}

function getImage(name) {
    if (document.layers) {
        return findImage(name, document);
    }
    return null;
}

function getObjNN4(obj,name)
{
    var x = obj.layers;
    var foundLayer;
    for (var i=0;i<x.length;i++)
    {
        if (x[i].id == name)
 	        foundLayer = x[i];
        else if (x[i].layers.length)
	        var tmp = getObjNN4(x[i],name);
        if (tmp) foundLayer = tmp;
    }
    return foundLayer;
}

function getElementHeight(element) {
    if (objBrowser.ns4) {
        var elem = getObjNN4(document, element);
        return elem.clip.height;
    } else {
        var elem;
        if(document.getElementById) {
	        var elem = document.getElementById(element);
        } else if (document.all){
	        var elem = document.all[element];
        }
        if (objBrowser.op5) {
	        xPos = elem.style.pixelHeight;
        } else {
	        xPos = elem.offsetHeight;
        }
        return xPos;
    }
}

function getElementWidth(element) {
    if (objBrowser.ns4) {
        var elem = getObjNN4(document, element);
        return elem.clip.width;
    } else {
        var elem;
        if(document.getElementById) {
	        var elem = document.getElementById(element);
        } else if (document.all){
	        var elem = document.all[element];
        }
        if (objBrowser.op5) {
	        xPos = elem.style.pixelWidth;
        } else {
	        xPos = elem.offsetWidth;
        }
        return xPos;
    }
}

function getElementLeft(element) {
    if (objBrowser.ns4) {
        var elem = getObjNN4(document, element);
        return elem.pageX;
    } else {
        var elem;
        if(document.getElementById) {
	        var elem = document.getElementById(element);
        } else if (document.all){
	        var elem = document.all[element];
        }
        xPos = elem.offsetLeft;
        tempEl = elem.offsetParent;
        while (tempEl != null) {
	        xPos += tempEl.offsetLeft;
	        tempEl = tempEl.offsetParent;
        }
        return xPos;
    }
}

function getElementTop(element) {
    if (objBrowser.ns4) {
        var elem = getObjNN4(document, element);
        return elem.pageY;
    } else {
        if(document.getElementById) {
	        var elem = document.getElementById(element);
        } else if (document.all) {
	        var elem = document.all[element];
        }
        yPos = elem.offsetTop;
        tempEl = elem.offsetParent;
        while (tempEl != null) {
	        yPos += tempEl.offsetTop;
	        tempEl = tempEl.offsetParent;
        }
        return yPos;
    }
}

function getImageLeft(myImage) {
    var x, obj;
    if (document.layers) {
        var img = getImage(myImage);
        if (img.container != null)
	        return img.container.pageX + img.x;
        else
	        return img.x;
    } else {
        return getElementLeft(myImage);
    }
    return -1;
}

function getImageTop(myImage) {
    var y, obj;
    if (document.layers) {
        var img = getImage(myImage);
        if (img.container != null)
	        return img.container.pageY + img.y;
        else
	        return img.y;
    } else {
        return getElementTop(myImage);
    }
    return -1;
}

function getImageWidth(myImage) {
    var x, obj;
    if (document.layers) {
        var img = getImage(myImage);
        return img.width;
    } else {
        return getElementWidth(myImage);
    }
    return -1;
}

function getImageHeight(myImage) {
    var y, obj;
    if (document.layers) {
        var img = getImage(myImage);
        return img.height;
    } else {
        return getElementHeight(myImage);
    }
    return -1;
}

function moveXY(myObject, x, y) {
    obj = getStyleObject(myObject)
    if (objBrowser.ns4) {
        obj.top = y;
        obj.left = x;
    } else {
        if (objBrowser.op5) {
	        obj.pixelTop = y;
	        obj.pixelLeft = x;
        } else {
	        obj.top = y + 'px';
	        obj.left = x + 'px';
        }
    }
}

function changeClass(element, myClass) {
    var elem;
    if(document.getElementById) {
        var elem = document.getElementById(element);
    } else if (document.all){
        var elem = document.all[element];
    }
    elem.className = myClass;
}

function changeImage(target, source) {
    var imageObj;

    if (objBrowser.ns4) {
        imageObj = getImage(target);
        if (imageObj) imageObj.src = eval(source).src;
    } else {
        imageObj = eval('document.images.' + target);
        if (imageObj) imageObj.src = eval(source).src;
    }
}

function changeBGColour(myObject, colour) {
    if (objBrowser.ns4) {
        var obj = getObjNN4(document, myObject);
        obj.bgColor=colour;
    } else {
        var obj = getStyleObject(myObject);
        if (objBrowser.op5) {
	        obj.background = colour;
        } else {
	        obj.backgroundColor = colour;
        }
    }
}

function getAbsolutePosition(element)
{
    var r = { x: element.offsetLeft, y: element.offsetTop };
    if (element.offsetParent) {
        var tmp = getAbsolutePosition(element.offsetParent);
        r.x += tmp.x;
        r.y += tmp.y;
    }
    return r;
};

/**
* Retrieve the coordinates of the given event relative to the center
* of the widget.
*
* @param event
*  A mouse-related DOM event.
* @param reference
*  A DOM element whose position we want to transform the mouse coordinates to.
* @return
*    A hash containing keys 'x' and 'y'.
*/
function getRelativeCoordinates(event, reference) {
    var x, y;
    event = event || window.event;
    var el = event.target || event.srcElement;
    if (!window.opera && typeof event.offsetX != 'undefined') {
        // Use offset coordinates and find common offsetParent
        var pos = { x: event.offsetX, y: event.offsetY };
        // Send the coordinates upwards through the offsetParent chain.
        var e = el;
        while (e) {
            e.mouseX = pos.x;
            e.mouseY = pos.y;
            pos.x += e.offsetLeft;
            pos.y += e.offsetTop;
            e = e.offsetParent;
        }

        // Look for the coordinates starting from the reference element.
        var e = reference;
        var offset = { x: 0, y: 0 }
        while (e) {
            if (typeof e.mouseX != 'undefined') {
                x = e.mouseX - offset.x;
                y = e.mouseY - offset.y;
                break;
            }
        offset.x += e.offsetLeft;
        offset.y += e.offsetTop;
        e = e.offsetParent;
        }
        // Reset stored coordinates
        e = el;
        while (e) {
            e.mouseX = undefined;
            e.mouseY = undefined;
            e = e.offsetParent;
        }
    }
    else {
        // Use absolute coordinates
        var pos = getAbsolutePosition(reference);
        x = event.pageX  - pos.x;
        y = event.pageY - pos.y;
    }
    // Subtract distance to middle
    return { x: x, y: y };
}

function utf8(wide) {
	var c, s;
  	var enc = "";
  	var i = 0;
  	while(i < wide.length) {
    	c= wide.charCodeAt(i++);
    	// handle UTF-16 surrogates
    	if (c >= 0xDC00 && c < 0xE000) continue;
    	if (c >= 0xD800 && c < 0xDC00) {
      		if (i >= wide.length) continue;
      		s = wide.charCodeAt(i ++);
      		if (s < 0xDC00 || c >= 0xDE00) continue;
      		c= ((c - 0xD800) << 10) + (s - 0xDC00) + 0x10000;
    	}
    	// output value
    	if (c < 0x80) enc += String.fromCharCode(c);
    	else if (c < 0x800) enc += String.fromCharCode(0xC0 + (c >> 6), 0x80 + (c & 0x3F));
    	else if (c < 0x10000) enc += String.fromCharCode(0xE0 + (c >> 12), 0x80 + (c >> 6 & 0x3F), 0x80 + (c & 0x3F));
	    else enc += String.fromCharCode(0xF0 + (c >> 18), 0x80 + (c >> 12 & 0x3F), 0x80 + (c >> 6&0x3F), 0x80 + (c & 0x3F));
  	}
  	return enc;
}

var hexchars = "0123456789ABCDEF";

function toHex(n) {
  	return hexchars.charAt(n >> 4) + hexchars.charAt(n & 0xF);
}


/*
     Example File From "JavaScript and DHTML Cookbook"
     Published by O'Reilly & Associates
     Copyright 2003 Danny Goodman
*/
function getElementStyle(elemID, IEStyleAttr, CSSStyleAttr) {
    var elem = document.getElementById(elemID);
    if(elem != null) {
        if (elem.currentStyle) {
            return elem.currentStyle[IEStyleAttr];
        } else if (window.getComputedStyle) {
            var compStyle = window.getComputedStyle(elem, "");
            return compStyle.getPropertyValue(CSSStyleAttr);
        }
    } else {
        //alert(elemID + " is not an element");
    }
    return "0";
}


function htmlEncode(value) {
    return value.replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;").replace(/\"/g, "&quot;").replace(/\'/g, "&#039;");
}

function htmlDecode(value) {
    return value.replace(/&amp;/g, "&").replace(/&lt;/g, "<").replace(/&gt;/g, ">").replace(/&quot;/g, "\"").replace(/&#039;/g, "'");
}

function appendOptionLast(objSelect, text, value)
{
    var newOpt = document.createElement('option');
    newOpt.text = text;
    newOpt.value = value;

    try {
        objSelect.add(newOpt, null); // standards compliant; doesn't work in IE
    } catch(ex) {
        objSelect.add(newOpt); // IE only
    }
}