function countChars(p_sText){

	// count the number of characters (without line breaks)
	
	var nPos;
	var nCount = 0, nLength;
		
	for (nPos = 0; nPos < p_sText.length; nPos++){ // count the number of newlines
		if (p_sText.charAt(nPos) == '\n'){	
			nCount += 1
		}
	}
	nLength = p_sText.length - (nCount * 2);
	
	// return the length of the character string
	return nLength;
}

function countCheckboxesSelected(p_sFormName, p_sCheckboxName){

	// count the number of checkboxes selected
	
	var oCheckbox = document.forms[p_sFormName].elements[p_sCheckboxName];
	var nCount = 0;
	var i;
	
	// count checked checkboxes
	for (i=0; i < oCheckbox.length; i++){
		if (oCheckbox[i].checked){
			nCount++
		}
	}
	
	// return the number of checked checkboxes
	return nCount;
}

function formatCurrency(p_sText){

	// format the string passed as currency

	var sText = p_sText.toString();
	var sPence, nPence, i;
	
	// remove £ and ,
	sText = sText.replace(/£|,/g, '');
		
	// a non numeric is returned without change
	if (isNaN(sText)){
		return p_sText;
	}
	
	// a negative number is returned without change
	if (parseFloat(sText) < 0){
		return p_sText;
	}
	
	// empty string defaults to zero
	if (sText == ''){
		sText = 0;
	}

	// extract the pence 	
	nPence = Math.floor((sText * 100 + 0.5) % 100); 
	
	// add the leading zero
	if (nPence < 10){
		sPence = "0" + nPence
	}
	else {
		sPence = nPence
	}
	
	// remove the pence
	sText = Math.floor(sText).toString();
	
	return (sText + '.' + sPence); 
}

function isNumber(p_sText, p_nNoOfDecimals){

	// numeric check 
	
	var sText = p_sText.toString();
	var sDecimals;
	
	// value must be numeric
	if (isNaN(p_sText)		
	||  sText == ''){
		return false;
	}
	
	// ensure it has a decimal point
	if (sText.indexOf('.') == -1){
		sText += '.';
	}
	sDecimals = sText.substring(sText.indexOf('.') + 1, sText.length);
	
	// must conform to the number of decimals specified
	if (sDecimals.length > p_nNoOfDecimals){
		return false;
	}
	
	return true;
}

function trim(p_sText){
		
	// remove leading and trailing spaces
	
	var sText = p_sText.toString();
	var nPos;
	
	// remove leading spaces
	nPos = sText.length
	while (sText.charAt(0) == ' '){
		sText = sText.substring(1, nPos);
	}
		
	// remove trailing spaces
	nPos = sText.length - 1;
	while (sText.charAt(nPos) == ' '){
		sText = sText.substring(0, nPos);
		nPos -= 1
	}
			
	return sText;
}

var defaultEmptyOK = false;
var date1 = "", date2 = "", datestop = 0, allOK = 0;

function makeArray(n) {

   for (var i = 1; i <= n; i++) {
      this[i] = 0
   } 
   return this
}

var daysInMonth = makeArray(12);
daysInMonth[1] = 31;
daysInMonth[2] = 29;   // must programmatically check this
daysInMonth[3] = 31;
daysInMonth[4] = 30;
daysInMonth[5] = 31;
daysInMonth[6] = 30;
daysInMonth[7] = 31;
daysInMonth[8] = 31;
daysInMonth[9] = 30;
daysInMonth[10] = 31;
daysInMonth[11] = 30;
daysInMonth[12] = 31;

function isEmpty(s)
{   return ((s == null) || (s.length == 0))
}

function isDigit (c)
{   return ((c >= "0") && (c <= "9"))
}

function isInteger (s)

{   var i;

    if (isEmpty(s)) 
       if (isInteger.arguments.length == 1) return defaultEmptyOK;
       else return (isInteger.arguments[1] == true);

    for (i = 0; i < s.length; i++)
    {   
        var c = s.charAt(i);

        if (!isDigit(c)) return false;
    }

    return true;
}

function isSignedInteger (s)

{   if (isEmpty(s)) 
       if (isSignedInteger.arguments.length == 1) return defaultEmptyOK;
       else return (isSignedInteger.arguments[1] == true);

    else {
        var startPos = 0;
        var secondArg = defaultEmptyOK;

        if (isSignedInteger.arguments.length > 1)
            secondArg = isSignedInteger.arguments[1];

        if ( (s.charAt(0) == "-") || (s.charAt(0) == "+") )
           startPos = 1;    
        return (isInteger(s.substring(startPos, s.length), secondArg))
    }
}

function isNonnegativeInteger (s)
{   var secondArg = defaultEmptyOK;

    if (isNonnegativeInteger.arguments.length > 1)
        secondArg = isNonnegativeInteger.arguments[1];

    return (isSignedInteger(s, secondArg)
         && ( (isEmpty(s) && secondArg)  || (parseInt (s) >= 0) ) );
}

function isYear (s)
{   if ((isEmpty(s)) || (!isNonnegativeInteger(s))) return false;
    s2 = s.substring(0,2);
	if (s2 != "18" && s2 != "19" && s2 != "20") return false;
    return (s.length == 4);
}

function isIntegerInRange (s, a, b)
{   if (isEmpty(s)) 
       if (isIntegerInRange.arguments.length == 1) return defaultEmptyOK;
       else return (isIntegerInRange.arguments[1] == true);

    if (!isInteger(s, false)) return false;

    var num = parseInt (s);
    return ((num >= a) && (num <= b));
}

function isMonth (s)
{   if (isEmpty(s)) 
       if (isMonth.arguments.length == 1) return defaultEmptyOK;
       else return (isMonth.arguments[1] == true);
    return isIntegerInRange (s, 1, 12);
}

function isDay (s)
{   if (isEmpty(s)) 
       if (isDay.arguments.length == 1) return defaultEmptyOK;
       else return (isDay.arguments[1] == true);   
    return isIntegerInRange (s, 1, 31);
}

function daysInFebruary (year)
{   
    return (  ((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0) ) ) ? 29 : 28 );
}

function isDate (year, month, day)
{   if (! (isYear(year, false) && isMonth(month, false) && isDay(day, false))) return false;
    var intYear = parseInt(year);
    var intMonth = parseInt(month);
    var intDay = parseInt(day);
    if (intDay > daysInMonth[intMonth]) return false; 
    if ((intMonth == 2) && (intDay > daysInFebruary(intYear))) return false;
    return true;
}

function dateValidation(dateVal){
	var novalid = 0;
	var thedate = "";
	var yearvar = "";
	var monthvar = "";
	var dayvar = "";
	if (dateVal != "") {
		pos = dateVal.indexOf("/");
		myday = dateVal.substring(0,pos);
		if (myday.substring(0,1)=="0") myday = myday.substring(1,2);
		dateVal = dateVal.substring(pos+1,dateVal.length);
		if (isDay(myday)) {
			dayvar = myday;
			if (dayvar.length==1) dayvar = "0" + dayvar;
			pos = dateVal.indexOf("/");
			mymonth = dateVal.substring(0,pos);
			myyear = dateVal.substring(pos+1,dateVal.length);
			if (mymonth.substring(0,1)=="0") mymonth = mymonth.substring(1,2);
			if (isMonth(mymonth)) {
				monthvar = mymonth;
				if (monthvar.length==1) monthvar = "0" + monthvar; 
				if (isYear(myyear)) {
					yearvar = myyear;
					if (!(isDate(myyear,mymonth,myday))) novalid = 1;
				}
				else{
					novalid = 1;
				}
			}
			else{
				novalid = 1;
			}
		}
		else{
			novalid = 1;
		}
	}
	if (novalid == 1){
		return -1
	}
	else {
		thedate = yearvar + monthvar + dayvar;
		return thedate;
	}
}

function dateLater(fieldVal,fieldname) {
var datelower = 0;
if (datestop == 0) {
	if (fieldVal != "" && date1 != null) {
		if (date2 < date1) {
			window.alert("This date must be the same or later than the other.");
			var obj=eval('document.form1.' + fieldname);
			allOK =0;
			obj.focus();
			obj.select();
			}
		else allOK = 1;
		}
	}
}

function ValidateDate(fieldVal1,fieldName1,fieldVal2,fieldName2,fieldVal3,fieldName3,radioName) {
	if (radioName != 'null'){
		//check the period of interest
		var obj2=eval('document.form1.' + radioName);
		if ((obj2[0].checked || obj2[1].checked || obj2[2].checked) && !(fieldVal3 > 0)) {
			window.alert("You have to type a value greater than zero in this field.");
			var obj=eval('document.form1.' + fieldName3);
			obj2[0].checked = false;
			obj2[1].checked = false;
			obj2[2].checked = false;
			obj.focus();
			obj.select();
			return;
			}
	}
	allOK = 0;
	
	//check the 'from' date
	date1 = dateValidation(fieldVal1,fieldName1);
	if (allOK == 0) return;

	//check date 'to' is not later than today
	dnow = new Date();
	var d1 = '' + dnow.getDate();
	var m1 = '' + (dnow.getMonth()+1);
	//window.alert(m1);
	if (m1.substring(0,1)=="0") m1 = m1.substring(1,2);
	var y1 = '' + dnow.getYear();
	if (y1.length == 2){ y1 = '19' + y1}
	var tdate = y1+m1+d1;
	
	//check the 'to' date
	date2 = dateValidation(fieldVal2,fieldName2);
	if (allOK == 0) return;

	dateLater(fieldVal2,fieldName2);
	if (allOK == 1) {
		document.form1.submit();
		}
	}

var postUrl='http://www.egpropertylink.com/searchV01/SearchResults.asp'

var M_PERIOD_ALL = '5';
var isNS = (navigator.appName.indexOf("Netscape") >= 0) ? true : false;
var m_bPostCodeDisabled = false;

function submitform(strPropertyID,strRegionID,strMethod,strAction,strKeywords,nOffSet,nResults)
{	
	var i, nCount, sPeriod, sDateFrom, sDateTo;
		
//	trim unwanted spaces
	document.property.street.value       = trim(document.property.street.value);
	document.property.town.value         = trim(document.property.town.value);
	document.property.postcode.value     = trim(document.property.postcode.value);
	document.property.NumTimeUnits.value = trim(document.property.NumTimeUnits.value);
	document.property.dateFrom.value     = trim(document.property.dateFrom.value);
	document.property.dateTo.value       = trim(document.property.dateTo.value);
	document.property.SIZE.value         = trim(document.property.SIZE.value);
	document.property.schemename.value   = trim(document.property.schemename.value);

//	option groups 1, 2 and 3 are mutually exclusive
	nCount = 0;
	
	if (document.property.street.value  != "" 
	||  document.property.town.value    != ""){
		nCount++;
	}
	if (document.property.postcode.value != ""){
		nCount++;
	}


	if (nCount > 1){
		alert('Please use ONLY ONE of the two options under Location.');
		document.property.street.focus();
		return;
	}
	
//  check town has been entered when street has been entered
	if (document.property.street.value != "" &&  document.property.town.value == "") {
	    alert('Please enter a Town for the Street');
	    document.property.town.focus();
	    document.property.town.select();
		return;
	}
	
//	'Number of Time Units'/period  and  From/To dates  are mutually exclusive
	if (document.property.NumTimeUnits.value != "" 
	&& (document.property.dateFrom.value != "" 
	||  document.property.dateTo.value   != "")){
		alert('Please specify a period of time OR enter From and To date(s)');
		document.property.NumTimeUnits.focus();
		return;
	}
	
//	check 'Number of Time Units' entered is numeric
	if (document.property.NumTimeUnits.value != ''){
		if (!isNumber(document.property.NumTimeUnits.value, 0)
		||  document.property.NumTimeUnits.value == 0){
			alert('Please enter a numeric value greater than zero for time period');
			document.property.NumTimeUnits.focus();
			document.property.NumTimeUnits.select();
			return;
		}
	}
	
//	check period is not set to 'all' when 'Number of Time Units' is entered
	if (document.property.NumTimeUnits.value != ''){
		sPeriod = -1;
		for (i=0; i < document.property.period.length; i++) {
			if (document.property.period[i].checked){
				sPeriod = document.property.period[i].value
			}
		}
		if (sPeriod == M_PERIOD_ALL) {
			alert("Please select Day(s), Week(s), Month(s) or Year(s)");
			document.property.NumTimeUnits.focus();
			return;
		}
	}
	
//	check dateFrom is a valid date
	sDateFrom = dateValidation(document.property.dateFrom.value);
	if (sDateFrom == -1){
	    alert('Please enter a valid From date');
	    document.property.dateFrom.focus();
	    document.property.dateFrom.select();
	    return;
	}
	
//  From date is mandatory when To date is entered
	if (document.property.dateFrom.value == ""
	&&  document.property.dateTo.value   != ""){
	    alert('Please enter a From date when To date is entered');
	    document.property.dateFrom.focus();
		return;
	}

//	check dateTo is a valid date
	sDateTo = dateValidation(document.property.dateTo.value);
	if (sDateTo == -1){
	    alert('Please enter a valid To date');
	    document.property.dateTo.focus();
	    document.property.dateTo.select();
	    return;
	}
	
//  To date can not be earlier than the From date
	if (sDateTo != ""){
		if (sDateTo < sDateFrom){
		    alert('Please enter a To date that is greater than or equal to the From date');
		    document.property.dateTo.focus();
		    document.property.dateTo.select();
			return;
		}
	}

//	check size is a non zero numeric
	if (document.property.SIZE.value != ''){
		if (!isNumber(document.property.SIZE.value, 4)){
			alert('Please enter a numeric value for Size (up to 4 decimals)');
			document.property.SIZE.focus();
			document.property.SIZE.select();
			return;
		}
		if (document.property.SIZE.value ==0){
			alert('Please enter a numeric value greater than 0');
			document.property.SIZE.focus();
			document.property.SIZE.select();
			return;
		}
	}
	
  	document.property.METHOD.value = strMethod;
   	document.property.PROPERTY_ID.value = strPropertyID;
   	document.property.REGION_ID.value = strRegionID;
   	
   	if(document.property.TO_LET_PRICE_PER_SQ_FOOT.value==""){
   		document.property.TO_LET_PRICE_PER_SQ_FOOTWEIGHT.value = "0";
   	}
   	else {
   		document.property.TO_LET_PRICE_PER_SQ_FOOTWEIGHT.value = "30";
   	}
   	
   	if(document.property.TO_LET_PRICE_PER_ANNUM.value==""){
   		document.property.TO_LET_PRICE_PER_ANNUMWEIGHT.value = "0";
   	}
   	else {
   		document.property.TO_LET_PRICE_PER_ANNUMWEIGHT.value = "30";
   	}
   	
   	if(document.property.FOR_SALE_PRICE.value==""){
   		document.property.FOR_SALE_PRICEWEIGHT.value = "0";
   	}
   	else {
   		document.property.FOR_SALE_PRICEWEIGHT.value = "30";
   	}	
   	if(document.property.SIZE.value==""){
   		document.property.SIZEWEIGHT.value = "0";
   	}
   	else {
   		document.property.SIZEWEIGHT.value = "30";
   	}
   		
   	if(document.property.AIR_CONDITIONING.checked){
   		document.property.AIR_CONDITIONINGWEIGHT.value = "1";
   	}
   	else {
   		document.property.AIR_CONDITIONINGWEIGHT.value = "0";
   	}
   	
   	if(document.property.CAR_PARKING.checked){
   		document.property.CAR_PARKINGWEIGHT.value = "1";
   	}
   	else {
   		document.property.CAR_PARKINGWEIGHT.value = "0";
   	}
   	
	if(document.property.RAISED_FLOORS.checked){
   		document.property.RAISED_FLOORSWEIGHT.value = "1";
   	}
   	else {
   		document.property.RAISED_FLOORSWEIGHT.value = "0";
   	}
   	
   	document.property.OFFSET.value = nOffSet
   	document.property.RESULTS.value = nResults
  	document.property.action = strAction
 	document.property.submit();
}

function NumTimeUnits_onchange(p_oText){

	var i;
	// reset the period if the 'Number of Time Units' is cleared
	if (trim(p_oText.value) == ""){
		for (i=0; i < document.property.period.length; i++) {
			if (document.property.period[i].value == M_PERIOD_ALL){
				document.property.period[i].checked = true;
			}
		}
	}
}

function RegionId_onfocus(){

	// disable REGION for Netscape
	if (m_bPostCodeDisabled){
		document.property.town.focus();
	}
}

function dopropertysearch()
{
	submitform('0','0','QUERY',postUrl,'','0','10');
}