var myVariable;
function delay() {
	myVariable = window.setTimeout('showdefault()',1500);
}

function stopdelay() {
	window.clearTimeout(myVariable);
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function MM_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}

function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);

function validate_contactus() {
	
	// salutation
	if (trimString(document.form1.salutation.value) == ""){
		alert("Please check that you have select salutation.");
		document.form1.salutation.focus();
		return false;	
	}
	
	// firstname
	if (trimString(document.form1.name.value) == ""){
		alert("Please check that you have entered a proper first name.");
		document.form1.name.focus();
		return false;		
	}
	
	// email address
	if (trimString(document.form1.email.value) == "" || !isValidEmail(document.form1.email.value)){
		alert("Please check that you have entered a valid email.");
		document.form1.email.focus();
		return false;
	}
	
	// contact no
	if (trimString(document.form1.contactno.value) == "" || !isValidNumber(document.form1.contactno.value)){
		alert("Please check that you have entered a valid contact number.");
		document.form1.contactno.focus();
		return false;
	}
	
	// country
	if (trimString(document.form1.country.value) == "Please Select One"){
		alert("Please check that you have select country of residence.");
		document.form1.country.focus();
		return false;	
	}
	
	// city
	if (trimString(document.form1.city.value) == ""){
		alert("Please check that you have entered a proper city.");
		document.form1.city.focus();
		return false;		
	}
	
	// company
	if (trimString(document.form1.company.value) == ""){
		alert("Please check that you have entered a proper company.");
		document.form1.company.focus();
		return false;		
	}
	
	// feedback
	if (trimString(document.form1.feedback.value) == ""){
		alert("Please check that you have type in your feedback.");
		document.form1.feedback.focus();
		return false;
	}
	
	document.form1.action="/ch/about_us/contactus_verify.asp";
	//document.form1.submit();
	return true;
}

function isValidEmail(email) {
	invalidChars = " /:,;!#$%^&*()+="
	if (email == "") { // cannot be empty
		return false
	}
	for (i=0; i<invalidChars.length; i++) { // does it contain any invalid characters?
		badChar = invalidChars.charAt(i)
		if (email.indexOf(badChar,0) > -1) {
			return false
		}
	}
	atPos = email.indexOf("@",1)			// there must be one "@" symbol
	if (atPos == -1) {
		return false
	}
	if (email.indexOf("@",atPos+1) != -1) {	// and only one "@" symbol
		return false
	}
	periodPos = email.indexOf(".",atPos)
	if (periodPos == -1) {					// and at least one "." after the "@"
		return false
	}
	if (periodPos+3 > email.length)	{		// must be at least 2 characters after the "."
		return false
	}
	return true
}

function isValidNumber(num) {
    var valid = '0123456789 -+';
    var str_space, str_plus, str_minus;

    fieldContent=num;
    fieldLength=fieldContent.length;

    
    for (var i=0; i< fieldLength; i++) {
       str_space = str_space + " ";
       str_plus = str_plus + "+";
       str_minus = str_minus + "-";
       
       if (valid.indexOf(fieldContent.charAt(i)) == -1)
          return false;
    }
    
    return true;
}

function isValidNric(nric) {
	var validnum = '0123456789';
	var validletter = 'fsFS';
	var valid = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
   
	ic=nric;
	icLength=ic.length;
	if (icLength != 9)
	return false;
	if (validletter.indexOf(ic.charAt(0)) == -1)
		return false;
   for (var i=1; i< icLength-1; i++) {
       if (validnum.indexOf(ic.charAt(i)) == -1)
          return false;
    }
	if (valid.indexOf(ic.charAt(icLength-1)) == -1)
		return false;
   return true;
}

function trimString(s) 
{
  // Remove leading spaces and carriage returns  
  while ((s.substring(0,1) == ' ') || (s.substring(0,1) == '\n') || (s.substring(0,1) == '\r')) {
    s = s.substring(1,s.length);
  }

  // Remove trailing spaces and carriage returns
  while ((s.substring(s.length-1,s.length) == ' ') || (s.substring(s.length-1,s.length) == '\n') || (s.substring(s.length-1,s.length) == '\r')) {
    s = s.substring(0,s.length-1);
  }
  return s;
}

function reset_contactus() {
	document.form1.name.value = "";
	document.form1.email.value = "";
	document.form1.contactno.value = "";
	document.form1.city.value = "";
	document.form1.company.value = "";	
	document.form1.feedback.value = "";
	return false;
}