function emailCheck (emailStr) {
	
	var emailPat=/^(.+)@(.+)$/
	var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
	var validChars="\[^\\s" + specialChars + "\]"
	var quotedUser="(\"[^\"]*\")"
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
	var atom=validChars + '+'
	var word="(" + atom + "|" + quotedUser + ")"
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")


	var matchArray=emailStr.match(emailPat)
	if (matchArray==null) {
		return false
	}
	
	var user=matchArray[1]
	var domain=matchArray[2]

	if (user.match(userPat)==null) {
    	return false
	}

	var IPArray=domain.match(ipDomainPat)
	if (IPArray!=null) {
		for (var i=1;i<=4;i++) {
		  	if (IPArray[i]>255) {
		  		return false
		  	}
		}
	   return true
	}

	var domainArray=domain.match(domainPat)
	if (domainArray==null) {
		return false
	}

	var atomPat=new RegExp(atom,"g")
	var domArr=domain.match(atomPat)
	var len=domArr.length
	if (domArr[domArr.length-1].length<2 || domArr[domArr.length-1].length>3) {
   	return false
	}

	if (len<2) {
	   return false
	}
	
	return true;
}

function resetform()
{
	this.frmContact.txtFullname.value = "";
	this.frmContact.txtadd.value = "";
	this.frmContact.txtPhone.value = "";
	this.frmContact.txtEmail.value = "";
	this.frmContact.txtcontent.value = "";
	this.frmContact.txtFullname.focus();
	return false;
}
function exits_alert()
{
	return confirm('Bạn có thực sự muốn thoát khỏi Hệ thống?')
}

function display_alert(str)
{
	alert(str);
}

function submitform_vn()
{
	var strFullname = this.frmContact.txtFullname.value;
	var strPhone = this.frmContact.txtPhone.value;
	var strEmail = this.frmContact.txtEmail.value;
	var strContent = this.frmContact.txtcontent.value;
	
	if (( strFullname == '') )
	{
		alert('Bạn chưa nhập tên người liên hệ!');
		this.frmContact.txtFullname.focus();
		return false;
	}
	else if ( (strPhone == '') )
	{
		alert('Bạn chưa nhập số điện thoại!');
		this.frmContact.txtPhone.focus();
		return false;
	}
	else if ( strEmail == '')
	{
		alert('Bạn chưa nhập email!');
		this.frmContact.txtEmail.focus();
		return false;
	}
	else if ( !emailCheck(strEmail))
	{
		alert('email của bạn không hợp lệ');
		this.frmContact.txtEmail.focus();
		return false;
	}
	else if ( (strContent == '') )
	{
		alert('Bạn chưa nhập nội dung cần liên hệ!');
		this.frmContact.txtcontent.focus();
		return false;
	}
	var bol = confirm('Bạn thực sự muốn gửi thông tin này cho chúng tôi?');
	if(bol)
	{
		return true;
	}
	else
	{
	return false;
	}
	
}

function submitform_en()
{
	var strFullname = this.frmContact.txtFullname.value;
	var strPhone = this.frmContact.txtPhone.value;
	var strEmail = this.frmContact.txtEmail.value;
	var strContent = this.frmContact.txtcontent.value;
	
	if (( strFullname == '') )
	{
		alert('Please enter your full name!');
		this.frmContact.txtFullname.focus();
		return false;
	}
	else if ( (strPhone == '') )
	{
		alert('Please enter your telephone!');
		this.frmContact.txtPhone.focus();
		return false;
	}
	else if ( strEmail == '')
	{
		alert('Please enter your email!');
		this.frmContact.txtEmail.focus();
		return false;
	}
	else if ( !emailCheck(strEmail))
	{
		alert('email is invalid');
		this.frmContact.txtEmail.focus();
		return false;
	}
	else if ( (strContent == '') )
	{
		alert('Please enter your comment!');
		this.frmContact.txtcontent.focus();
		return false;
	}
	var bol = confirm('Are you sure want to send abow infomation?');
	if(bol)
	{
		return true;
	}
	else
	{
	return false;
	}
	
}


///////////////////Function for AJAX
//Validate sortname
function check_name(name) {

    var sName = name;
    var oXmlHttp = zXmlHttp.createRequest();
    oXmlHttp.open("get", "./includes/validate/check_reg.php?name=" + escape(sName), true);
    oXmlHttp.onreadystatechange = function () {
        if (oXmlHttp.readyState == 4) {
            if (oXmlHttp.status == 200) {
                display_check_name(oXmlHttp.responseText);
            } else {
                display_check_name("An error occurred: " + oXmlHttp.statusText); //statusText is not always accurate
            }
        }            
    };
    oXmlHttp.send(null);
}

function display_check_name(sText) {
    var check_name = document.getElementById("check_name");
    check_name.innerHTML = sText;
}
//Validate email
function check_email(email) {

    var sEmail = email;
    var oXmlHttp = zXmlHttp.createRequest();
    oXmlHttp.open("get", "./includes/validate/check_reg.php?email=" + escape(sEmail), true);
    oXmlHttp.onreadystatechange = function () {
        if (oXmlHttp.readyState == 4) {
            if (oXmlHttp.status == 200) {
                display_check_email(oXmlHttp.responseText);
            } else {
                display_check_email("An error occurred: " + oXmlHttp.statusText); //statusText is not always accurate
            }
        }            
    };
    oXmlHttp.send(null);
}

function display_check_email(sText) {
    var check_email = document.getElementById("check_email");
    check_email.innerHTML = sText;
}
//Validate phone
function check_phone(phone) {

    var sPhone = phone;
    var oXmlHttp = zXmlHttp.createRequest();
    oXmlHttp.open("get", "./includes/validate/check_reg.php?phone=" + escape(sPhone) , true);
    oXmlHttp.onreadystatechange = function () {
        if (oXmlHttp.readyState == 4) {
            if (oXmlHttp.status == 200) {
                display_check_phone(oXmlHttp.responseText);
            } else {
                display_check_phone("An error occurred: " + oXmlHttp.statusText); //statusText is not always accurate
            }
        }            
    };
    oXmlHttp.send(null);
}

function display_check_phone(sText) {
    var check_phone = document.getElementById("check_phone");
    check_phone.innerHTML = sText;
}
/////////////////////

function login()
{
	
	var username = this.frmLogin.txtUsername.value;	
	var password = this.frmLogin.txtPassword.value;
	
	if ( (username == '') )
	{
		alert('Bạn chưa nhập tên truy cập!');
		this.frmLogin.txtUsername.focus();
		return false;
	}
	if (password == '')
	{
		alert('Bạn chưa nhập mật khẩu!');
		this.frmLogin.txtPassword.focus();
		return false;
	}	
}


/**
 * DHTML date validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */
// 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("Bạn phải nhập ngày theo dạnh : dd-mm-yyyy")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Bạn nhập sai tháng")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Bạn nhập sai ngày")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Nhập vào năm có giá trị giữa: "+minYear+" and "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Nhập ngày không chính xác")
		return false
	}
return true
}
// Hien thi menu
function switchDisplay(id)
{
	ctrl = document.getElementById(id);
		
	if (ctrl.style.display == "")
	{
		ctrl.style.display = "none";	
	}
	else
	{
		ctrl.style.display = "";
	}	
	//Close all other menu items
	var catids = document.getElementById('catids');
	catids = catids.value.split(",");
	var len = catids.length;
	for(var i=0;i<len;i++)
		if(catids[i]!=id)
		{
			menuItem = document.getElementById(catids[i]);
			menuItem.style.display="none";
		}
}

function hienmenu(id)
{
	alert(id);
	ctrl = document.getElementById(id);
	if (ctrl.style.display == "")
		ctrl.style.display = "none";
	else
		ctrl.style.display = "";
}
function Scroller_onmouseover(id)
{
	id.scrollAmount =0;
}

function Scroller_onmouseout(id)
{
	id.scrollAmount =1;
}
function go(form) 
{
	var URL = form.selectmenu.value;
	if ( URL != "")
	{
		window.open(URL, '_blank');
		return false;
	}
	else
		return false;
}

function ingo(form) 
{
	var URL = form.selectmenu.value;
	if ( URL != "")
	{
		window.open(URL, '_self');
		return false;
	}
	else
		return false;
}

function changelist(form, url) 
{
	var URL = url + form.cbConsulting_Area.value;
	if ( URL != "")
	{
		window.open(URL, "_self");
		return false;
	}
	else
		return false;
}


function show_popup(pid)
{
	window.open("./includes/gallery_view.php?id=" + pid,"my_new_window","location: yes, status=no, menubar=no ,scrollbars=yes, resizable=no, copyhistory=yes, width=450, height=500");
	return false;
}