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];}
}

// properties: width=500,height=400,toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=1,screenX=0,screenY=0,left=0,top=0,dependent=1
function popUp(filename, properties)
{
    window.open(filename, 'popUpWin', properties);
}

// form validation
function validateForm(form)
{
    for(var i=0; i<form.elements.length; i++)
    {
        if (form.elements[i].lang == "req" && form.elements[i].value == "")
        {
            alert('Please enter ' + form.elements[i].name);
            return false;
        }
    }
    return true;
}

function show(sElem)
{
	if (document.getElementById)
		document.getElementById(sElem).style.visibility="visible";
    else if (document.all) // old IE
        document.all(sElem).style.visibility="visible";
    else if (document.layers) // Netscape 4
        document.layers(sElem).visibility="visible";
}

function hide(sElem)
{
	if (document.getElementById)
		document.getElementById(sElem).style.visibility="hidden";
    else if (document.all) // old IE
        document.all(sElem).style.visibility="hidden";
    else if (document.layers) // Netscape 4
        document.layers(sElem).visibility="hidden";
}

function setInnerHtml(sElem, sContent)
{
	if (document.getElementById)
	{
		if (document.getElementById(sElem) != null)
			document.getElementById(sElem).innerHTML=sContent;
	}
}

function ValidateLookup()
{
	if (document.postcodelookup.CKFld_country.options[document.postcodelookup.CKFld_country.selectedIndex].value != "uk")
		hide('spnFindAdd');
	else
		show('spnFindAdd');
}

function CopyName()
{
	if (document.postcodelookup.name_prefix.selectedIndex != -1)
		document.AddAddress.CKFld_name_prefix.value = document.postcodelookup.name_prefix.options[document.postcodelookup.name_prefix.selectedIndex].value;

	document.AddAddress.CKFld_first_name.value = document.postcodelookup.first_name.value;
	document.AddAddress.CKFld_last_name.value = document.postcodelookup.last_name.value;
	return true;
}

function limitText(limitField, limitNum) 
{
	if (limitField.value.length > limitNum) 
	{
		limitField.value = limitField.value.substring(0, limitNum);
	} 
}

// check for cookies enabled
function CookieCheck(sUrl)
{
    // Check whether cookies enabled
    document.cookie = "Enabled=true";
    var cookieValid = document.cookie;
    	
    // if retrieving the VALUE we just set actually works
    // then we know cookies enabled
    if (cookieValid.indexOf("Enabled=true") == -1)
    {
	    alert("You need to enable cookies on your browser to take advantage of our online ordering");
	    document.location.href = sUrl;
	    return false;
    }
    else
        return sigmaFormVerify(this);
}

// First, we must verify that the telephone number only contains numbers
function ValidatePhoneNumber(strField)
{
    var field = document.getElementById(strField);
    var strString = field.value;
    var blnResult = true;
    var sErrorMsg = "Telephone number: please do not exceed 19 characters including spaces."

    if (strString.length == 0 || strString.length > 19)
    {
        alert(sErrorMsg);
        blnResult = false;
    }
    
    return blnResult;
}

// This script will validate the phone number, including area code 
// First, we must verify that the telephone number only contains numbers
function IsValid(strField)
{
    var field = document.getElementById(strField);
    var strValidChars = "0123456789";
    var strString = field.value;
    var blnResult = true;
    var sErrorMsg = "Telephone number:  please do not exceed 19 characters including spaces."
    if (strString.length == 0)
    {
        alert(sErrorMsg);
        return false;
    }

    //  test strString consists of valid characters listed above
    for (i = 0; i < strString.length && blnResult == true; i++)
    {
        strChar = strString.charAt(i);
        if (strValidChars.indexOf(strChar) == -1)
        {
            alert(sErrorMsg);
            return false;
        }
    }

    // Now we must ensure that the number is no longer than 12 digits
    if(strString.length > 12)
    {
        alert(sErrorMsg);
        return false;
    }
}

function buybutton(url, id)
{
	var element = "qty_"+id;
	var dd = document.getElementById(element);
	var selecteditem = dd.selectedIndex ;

	if(selecteditem != null)
	{
		var amount = dd.options[ selecteditem].value ;

		redirec = url+"&qty="+amount;
		window.location = redirec;
	}
	else
	{
		window.location = url;
	}
}