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 SetChecked(strFormName, strCheckboxNames, blnStatus) 
{
	var theForm = eval('document.'+strFormName)

    for (i=0,n=theForm.elements.length;i<n;i++)
		if (theForm.elements[i].name.indexOf(strCheckboxNames) !=-1)
            theForm.elements[i].checked = eval(blnStatus);
}


function anyChecked(strFormName, strCheckboxNames) 
{
	var theForm = eval('document.'+strFormName)
	var anyChecked = false

	    for (i=0,n=theForm.elements.length;i<n;i++)
	        if (theForm.elements[i].name.indexOf(strCheckboxNames) !=-1)
	            if (theForm.elements[i].checked==true)
					return true;
	return false;
            
}

function checkForm(clicked)
			{
			
								if (!isTextFieldBlank('enquiry_form', 'realname', 'Value Required : Contact Name:')){return false;}
							
								if (!isTextFieldBlank('enquiry_form', 'email', 'Value Required : E-mail (essential for a reply):')){return false;}
							
	
			document.enquiry_form.Button.value = clicked;
			return true;
		}

function noneChecked(strFormName, strCheckboxNames, strMessage) 
{
	var theForm = eval('document.'+strFormName)
	var anyChecked = false
	var counter = 0

	    for (i=0,n=theForm.elements.length;i<n;i++)
	        if (theForm.elements[i].name.indexOf(strCheckboxNames) !=-1)
	        
	            if (theForm.elements[i].checked==true)
					return true;
				else
					counter = counter + 1
						
	if(counter == n)
	{
		alert(strMessage)
		return false;	
	}
		
	return false;
		            
}

function isListSelected(strFormName, strListName, strMessage, strEmpty)
{
	var listName = eval('document.'+strFormName+'.'+strListName)

	if (listName.selectedIndex > -1)
		{
		if (listName.options[listName.selectedIndex].value == strEmpty)
			{
			if (strMessage > "")
				{
				alert(strMessage)
				}
			listName.focus();
			return false;
			}
		else
			return true;
		}
	else
		{
		if (strMessage > "")
			{
			alert(strMessage)
			}
		listName.focus();
		return false;
		}
}

function isTextFieldBlank(strFormName, strTextFieldName, strMessage)
{

	var myTextbox = eval('document.' + strFormName + '.' + strTextFieldName)
	var strData = eval('myTextbox.value')

	strData = trim(strData)	
	if (strData == "")
	{
		if (strMessage > "")
			{
			alert(strMessage)
			}
		eval(myTextbox.select())
		eval(myTextbox.focus())
		return false;
	}
	else
		return true;

}


function trim(strText) { 
    // this will get rid of leading spaces 
    while (strText.substring(0,1) == ' ') 
        strText = strText.substring(1, strText.length);

    // this will get rid of trailing spaces 
    while (strText.substring(strText.length-1,strText.length) == ' ')
        strText = strText.substring(0, strText.length-1);

   return strText;
} 


function doesTextFieldContain(strFormName, strTextFieldName, strMessage, strAllowableText) {
	var myTextbox = eval('document.' + strFormName + '.' + strTextFieldName)
	var strData = eval('myTextbox.value')
	strData = trim(strData)
	var allowed = strAllowableText; // define valid characters
    for (var i=0; i< strData.length; i++) {
        if (allowed.indexOf(strData.charAt(i)) == -1) {
			if (!(strMessage==""))
				alert(strMessage)
			eval(myTextbox.select())
			eval(myTextbox.focus())
			return false;
        }
    }
    return true;
}


function isTextFieldNumberBetween(strFormName, strTextFieldName, strMessage, intMinValue, intMaxValue, strNumType) {
	var myTextbox = eval('document.' + strFormName + '.' + strTextFieldName)
	var strData = eval('myTextbox.value')
	strData = trim(strData)
	
	if (strNumType == 'f')
	{
		if (doesTextFieldContain(strFormName, strTextFieldName, strMessage, '1234567890.'))
		{
			if ((parseFloat(strData) < parseFloat(intMinValue)) || (parseFloat(strData) > parseFloat(intMaxValue)))
			{
				if (!(strMessage==""))
					alert(strMessage)
				eval(myTextbox.select())
				eval(myTextbox.focus())
				return false;
			}
		}
		else
			return false;
	}
	else if (strNumType == 'i')
	{
		if (doesTextFieldContain(strFormName, strTextFieldName, strMessage, '1234567890'))
		{
			if ((parseInt(strData) < parseInt(intMinValue)) || (parseInt(strData) > parseInt(intMaxValue)))
			{
				if (!(strMessage==""))
					alert(strMessage)
				eval(myTextbox.select())
				eval(myTextbox.focus())
				return false;
			}
		}
		else
			return false;
	}
	return true;
}

function areTextFieldsDate(strFormName, intElementID, strMessage)
{
	var myDay = eval('document.' + strFormName + '.Day' + intElementID + '.value');
	var myMonth = eval('document.' + strFormName + '.Month' + intElementID + '.value');
	var myYear = eval('document.' + strFormName + '.Year' + intElementID + '.value');
	

	if (!isTextFieldBlank(strFormName, 'Day'+intElementID, strMessage))
		return false;
	if (!isTextFieldBlank(strFormName, 'Month'+intElementID, strMessage))
		return false;
	if (!isTextFieldBlank(strFormName, 'Year'+intElementID, strMessage))
		return false;

	if (!doesTextFieldContain(strFormName, 'Day'+intElementID, strMessage, "1234567890"))
		return false;
	if (!doesTextFieldContain(strFormName, 'Month'+intElementID, strMessage, "1234567890"))
		return false;
	if (!doesTextFieldContain(strFormName, 'Year'+intElementID, strMessage, "1234567890"))
		return false;


	if (myDay<=0 || myDay >31)
	{dateBoxWarning(strFormName, 'Day'+intElementID, strMessage)
	return false;}
		
	if (myMonth<=0 || myMonth >12)
	{dateBoxWarning(strFormName, 'Month'+intElementID, strMessage)
	return false;}

	if (myYear <1000 || myYear>9999)
	{dateBoxWarning(strFormName, 'Year'+intElementID, strMessage)
	return false;}

	if (!checkMonthLength(myMonth,myDay))
		{dateBoxWarning(strFormName, 'Month'+intElementID, '')
		return false;}

	if (myMonth == 2)
		if (!checkLeapMonth(myMonth,myDay,myYear)) 
			{dateBoxWarning(strFormName, 'Month'+intElementID, '')
			return false}


	return true;
}

function isDateEntered(strFormName, intElementID)
{
	var myDay = eval('document.' + strFormName + '.Day' + intElementID + '.value');
	var myMonth = eval('document.' + strFormName + '.Month' + intElementID + '.value');
	var myYear = eval('document.' + strFormName + '.Year' + intElementID + '.value');

	if (myDay != '' || myMonth != '' || myYear != '')
		return true;
	else
		return false;
}


function checkMonthLength(mm,dd) {
	mm = parseInt(mm)
	var months = new Array("","January","February","March","April","May","June","July","August","September","October","November","December")
	if ((mm == 4 || mm == 6 || mm == 9 || mm == 11) && dd > 30) {
		alert(months[mm] + " has only 30 days.")
		return false
	} else if (dd > 31) {
		alert(months[mm] + " has only 31 days.")
		return false
	}
	return true
}


function checkLeapMonth(mm,dd,yyyy) {
	if (yyyy % 4 > 0 && dd > 28) {
		alert("February of " + yyyy + " has only 28 days.")
		return false
	} else if (dd > 29) {
		alert("February of " + yyyy + " has only 29 days.")
		return false
	}
	return true
}


function dateBoxWarning(strFormName, strElement, strMessage)
{
	var myTextbox = eval('document.' + strFormName + '.' + strElement)
	if (strMessage !="")
		alert(strMessage)
	eval(myTextbox.select())
	eval(myTextbox.focus())
}



function dateComparison(strFormName ,intElementID, strCompDay, strCompMonth, strCompYear, strComparison, strMessage)
{
	var myDay = eval('document.' + strFormName + '.Day' + intElementID + '.value');
	var myMonth = eval('document.' + strFormName + '.Month' + intElementID + '.value');
	var myYear = eval('document.' + strFormName + '.Year' + intElementID + '.value');
	var myDayBox = eval('document.' + strFormName + '.Day' + intElementID)
	var blnResult

	// Note : Javascript accepts dates from 0-11 not 1-12
	var dteBase = new Date(myYear, myMonth-1, myDay)
	var dteCompare = new Date(strCompYear, strCompMonth-1, strCompDay)
	if (eval('dteCompare' + strComparison + 'dteBase'))
		blnResult = true;
	else
		blnResult =  false;
	
	if (blnResult == false)
	{
		if (strMessage !="")
			alert(strMessage)
		eval(myDayBox.select())
		eval(myDayBox.focus())
		return false;
	}
	else
		return true;

} 


function dateComparisonDP(strFormName ,intElementID1, intElementID2, strComparison, strMessage)
{
	var myDay1 = eval('document.' + strFormName + '.Day' + intElementID1 + '.value');
	var myMonth1 = eval('document.' + strFormName + '.Month' + intElementID1 + '.value');
	var myYear1 = eval('document.' + strFormName + '.Year' + intElementID1 + '.value');
	var blnResult

	// Note : Javascript accepts dates from 0-11 not 1-12
	var dteBase = new Date(myYear1, myMonth1-1, myDay1)

	var myDay2 = eval('document.' + strFormName + '.Day' + intElementID2 + '.value');
	var myMonth2 = eval('document.' + strFormName + '.Month' + intElementID2 + '.value');
	var myYear2 = eval('document.' + strFormName + '.Year' + intElementID2 + '.value');
	// Note : Javascript accepts dates from 0-11 not 1-12
	var dteCompare = new Date(myYear2, myMonth2-1, myDay2)
	
	if (eval('dteBase' + strComparison + 'dteCompare'))
		blnResult = false;
	else
		blnResult =  true;
	
	if (blnResult == false)
	{
		if (strMessage !="")
			alert(strMessage)
		return false;
	}
	else
		return true;

} 


function isTextFieldPostcode(strFormName, strTextFieldName, strMessage)
{
	var myTextbox = eval('document.' + strFormName + '.' + strTextFieldName)
	var strData = eval('myTextbox.value')
	var size, i;
	size = strData.length
	strData = strData.toUpperCase(); //Change to uppercase
	
	// ensure no non-number/alpha characters (except space)
	for(i=0;i<size;i++)
	{
		if (strData.charAt(i) != " ")
		{
			if ((strData.charAt(i) < "0" || strData.charAt(i) > "9") && (strData.charAt(i) < "A" || strData.charAt(i) > "Z"))
			{
			ShowMessageAndSetFocus(myTextbox, strMessage)
			return false;
			}
		}
	}
	
 while (strData.slice(0,1) == " ") //Strip leading spaces
  {strData = strData.substr(1,size-1);size = strData.length
  }
 while(strData.slice(size-1,size)== " ") //Strip trailing spaces
  {strData = strData.substr(0,size-1);size = strData.length
  }
 
 if (size < 6 || size > 8){ //Code length rule
  ShowMessageAndSetFocus(myTextbox, strMessage)
  return false;
  }
 if (strData.charAt(0) < "A"  || strData.charAt(0) > "Z"){ //leftmost character must be alpha character rule
  ShowMessageAndSetFocus(myTextbox, strMessage)
  return false;
  }
if (strData.charAt(size-3) < "0"  || strData.charAt(size-3) > "9"){ //first character of inward code must be numeric rule  
  ShowMessageAndSetFocus(myTextbox, strMessage)
  return false;
  }
  
 if (strData.charAt(size-2) < "A"  || strData.charAt(size-2) > "Z"){ //second character of inward code must be alpha rule
  ShowMessageAndSetFocus(myTextbox, strMessage)
  return false;
  }
 
 if (strData.charAt(size-1) < "A"  || strData.charAt(size-1) > "Z"){ //third character of inward code must be alpha rule
  ShowMessageAndSetFocus(myTextbox, strMessage)
  return false;
  }
  
 if (!(strData.charAt(size-4) == " ")){//space in position length-3 rule
  ShowMessageAndSetFocus(myTextbox, strMessage)
  return false;
   }
   
 count1 = strData.indexOf(" ");count2 = strData.lastIndexOf(" ");
 if (count1 != count2){//only one space rule
  ShowMessageAndSetFocus(myTextbox, strMessage)
  return false;
  }
return true;
}


function ShowMessageAndSetFocus(objTextbox, sMessage)
{
objTextbox.select()
objTextbox.focus()
alert(sMessage)
}


function isTextFieldEmail(strFormName, strTextFieldName, strMessage) {

	var myTextbox = eval('document.' + strFormName + '.' + strTextFieldName)
	var strData = eval('myTextbox.value')

	strData = trim(strData)	
    if (strData.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) != -1)
        return true;
    else
    {
		ShowMessageAndSetFocus(myTextbox, strMessage)
		return false;
	}
}