function lengthcheck(dataitem){
	  if (dataitem.value==""){
	     window.alert("All compulsory fields must be filled.");
	     return false;
	     }
	  else return true;
    }
	
	
	
	function passwords(first,second){
	   if (first==second){
	      return true;
		  }
	   else{
	       window.alert("The passwords do not match.");
		   return false;
		  }
	}
	
	
	
	
function isemail(stremail)
{

    
	if (stremail.length==0)
	   {
	   return true;
	   }
	else
	   {
	     if (stremail.length<5){
	            window.alert("The E-mail address is too short to be correct.");
		        return false;
		}
		else{
	         if (stremail.indexOf("@")==-1){
               alert("Your e-mail address needs an @");
                return false;
			 }
			 else{
			    if (stremail.indexOf(".")==-1){
                  alert("Your e-mail address needs a full stop");
                  return false;
				 }
			    else{
				   return true;
				 }
		      }
		  }
	    }     
}

function checkdate(objName) {
var datefield = objName;
if (chkdate(objName) == false) {
datefield.select();
alert("That date is invalid.  Please try again.");
datefield.focus();
return false;
}
else {
return true;
   }
}



function chkdate(objName) {
//var strDatestyle = "US"; //United States date style
var strDatestyle = "EU";  //European date style
var strDate;
var strDateArray;
var strDay;
var strMonth;
var strYear;
var intday;
var intMonth;
var intYear;
var booFound = false;
var datefield = objName;
var strSeparatorArray = new Array("-"," ","/",".");
var intElementNr;
var err = 0;
var strMonthArray = new Array(12);
strMonthArray[0] = "Jan";
strMonthArray[1] = "Feb";
strMonthArray[2] = "Mar";
strMonthArray[3] = "Apr";
strMonthArray[4] = "May";
strMonthArray[5] = "Jun";
strMonthArray[6] = "Jul";
strMonthArray[7] = "Aug";
strMonthArray[8] = "Sep";
strMonthArray[9] = "Oct";
strMonthArray[10] = "Nov";
strMonthArray[11] = "Dec";
strDate = datefield.value;
if (strDate.length < 1) {
return true;
}
for (intElementNr = 0; intElementNr < strSeparatorArray.length; intElementNr++) {
if (strDate.indexOf(strSeparatorArray[intElementNr]) != -1) {
strDateArray = strDate.split(strSeparatorArray[intElementNr]);
if (strDateArray.length != 3) {
err = 1;
return false;
}
else {
strDay = strDateArray[0];
strMonth = strDateArray[1];
strYear = strDateArray[2];
}
booFound = true;
   }
}
if (booFound == false) {
if (strDate.length>5) {
strDay = strDate.substr(0, 2);
strMonth = strDate.substr(2, 2);
strYear = strDate.substr(4);
   }
}
if (strYear.length == 2) {
strYear = '20' + strYear;
}
// US style
if (strDatestyle == "US") {
strTemp = strDay;
strDay = strMonth;
strMonth = strTemp;
}
intday = parseInt(strDay, 10);
if (isNaN(intday)) {
err = 2;
return false;
}
intMonth = parseInt(strMonth, 10);
if (isNaN(intMonth)) {
for (i = 0;i<12;i++) {
if (strMonth.toUpperCase() == strMonthArray[i].toUpperCase()) {
intMonth = i+1;
strMonth = strMonthArray[i];
i = 12;
   }
}
if (isNaN(intMonth)) {
err = 3;
return false;
   }
}
intYear = parseInt(strYear, 10);
if (isNaN(intYear)) {
err = 4;
return false;
}
if (intMonth>12 || intMonth<1) {
err = 5;
return false;
}
if ((intMonth == 1 || intMonth == 3 || intMonth == 5 || intMonth == 7 || intMonth == 8 || intMonth == 10 || intMonth == 12) && (intday > 31 || intday < 1)) {
err = 6;
return false;
}
if ((intMonth == 4 || intMonth == 6 || intMonth == 9 || intMonth == 11) && (intday > 30 || intday < 1)) {
err = 7;
return false;
}
if (intMonth == 2) {
if (intday < 1) {
err = 8;
return false;
}
if (LeapYear(intYear) == true) {
if (intday > 29) {
err = 9;
return false;
}
}
else {
if (intday > 28) {
err = 10;
return false;
}
}
}
if (strDatestyle == "US") {
datefield.value = strMonthArray[intMonth-1] + " " + intday+" " + strYear;
}
else {
datefield.value = intday + " " + strMonthArray[intMonth-1] + " " + strYear;
}
return true;
}


function LeapYear(intYear) {
if (intYear % 100 == 0) {
if (intYear % 400 == 0) { return true; }
}
else {
if ((intYear % 4) == 0) { return true; }
}
return false;
}
function doDateCheck(from, to) {
if (Date.parse(from.value) <= Date.parse(to.value)) {
alert("The dates are valid.");
}
else {
if (from.value == "" || to.value == "") 
alert("Both dates must be entered.");
else 
alert("To date must occur after the from date.");
   }
}

 
function CheckInt(field) {
var valid = "0123456789."
var ok = "yes";
var temp;
for (var i=0; i<field.value.length; i++) {
temp = "" + field.value.substring(i, i+1);
if (valid.indexOf(temp) == "-1") ok = "no";
}
if (ok == "no") {
alert("Invalid entry!  Only numbers are accepted!");
field.focus();
field.select();
return false;
   }
   return true; 
}

function ValidateForm() 
{		//window.alert(document.getElementById("name").value)				
	if (document.getElementById("name").value!="" && document.getElementById("address").value!="" && document.getElementById("email").value!=""){
			window.alert("Thank you for filling in the form, you will be contacted shortly.")
			document.enquiryForm.submit();
			
		 }
  else
  			{
				window.alert("Please fill in the name, address and email field")
			}
}
function bookclub(){
	document.joinbookclub.submit();
	}