//FUNCTION CHECK EMAIL =========================================================================

function isEmail(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) {
	//alert("Email address seems incorrect (check @ and .'s)")
	return false
}
var user=matchArray[1]
var domain=matchArray[2]

if (user.match(userPat)==null) {
    //alert("The username doesn't seem to be valid.")
    return false
}

var IPArray=domain.match(ipDomainPat)
if (IPArray!=null) {
    // this is an IP address
	  for (var i=1;i<=4;i++) {
	    if (IPArray[i]>255) {
	        //alert("Destination IP address is invalid!")
		return false
	    }
    }
    return true
}

// Domain is symbolic name
var domainArray=domain.match(domainPat)
if (domainArray==null) {
	//alert("The domain name doesn't seem to be valid.")
    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) {
   // the address must end in a two letter or three letter word.
   //alert("The address must end in a three-letter domain, or two letter country.")
   return false
}

// Make sure there's a host name preceding the domain.
if (len<2) {
   var errStr="This address is missing a hostname!"
   //alert(errStr)
   return false
}

// If we've gotten this far, everything's valid!
return true;
}


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

//FUNCTION CHECK NUMBER ===============================================================================

function checkNumber(s){
		if (s!="")
		{
			var str="0123456789"; 
			for(var j=0;j<str.length;j++)
			if(str.indexOf(s.charAt(j))==-1){								
				return false;
			}		  	
		}
		return true;
	}	

// FUNCTION OPEN NEW WINDOW ==========================================================================

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

// FUNCTION TRIM STRING =============================================================================

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

function CheckForm(frmContact)
{
	if(trim(frmContact.txtName.value)=="")
	{
			alert("Please input Name");
			
			frmContact.txtName.focus();
			return false;
		}
	if(isEmail(frmContact.txtEmail.value)==false)
	{
			alert("Please input Email");
			
			frmContact.txtEmail.focus();
			return false;
		}
	if(trim(frmContact.txtSub.value)=="")
	{
			alert("Please input Subject");
			
			frmContact.txtSub.focus();
			return false;
		}
	if(trim(frmContact.txtComment.value)=="")
	{
			alert("Please input your Message");
			
			frmContact.txtComment.focus();
			return false;
		}
	return true;
}

function CheckNewletter(frmNewsletter)
{
	if(isEmail(frmNewsletter.txtNewsEmail.value)==false)
	{
			alert("Please input Email");			
			frmNewsletter.txtNewsEmail.focus();
			return false;
		}
	return true;
	}
// FUNCTION CHECK SUBMIT FORM CONTACT ===============================================================