var dtCh= '/';
var minYear=1900;
var maxYear=2100;

function isInteger(s)
{
	var i;
    for (i = 0; i < s.length; i++)
	{   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < '0') || (c > '9'))) 
		return false;
	}
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag)
{
	var i;
    var returnString = '';
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++)
	{   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year)
{
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}

function DaysArray(n) 
{
	for (var i = 1; i <= n; i++) 
	{
		this[i] = 31;
		if (i==4 || i==6 || i==9 || i==11) 
		{
		this[i] = 30;
		}
		if (i==2) 
		{
		this[i] = 29;
		}
   } 
   return this;
}

function isDate(dtStr)
{
	var daysInMonth = DaysArray(12);
	var pos1=dtStr.indexOf(dtCh);
	var pos2=dtStr.indexOf(dtCh,pos1+1);
	var strMonth=dtStr.substring(0,pos1);
	var strDay=dtStr.substring(pos1+1,pos2);
	var strYear=dtStr.substring(pos2+1);
	strYr=strYear;
	if (strDay.charAt(0)=='0' && strDay.length>1) 
		strDay=strDay.substring(1);
	if (strMonth.charAt(0)=='0' && strMonth.length>1) 
		strMonth=strMonth.substring(1);
	
	for (var i = 1; i <= 3; i++) 
	{
		if (strYr.charAt(0)=='0' && strYr.length>1) 
		strYr=strYr.substring(1);
	}
	month=parseInt(strMonth);
	day=parseInt(strDay);
	year=parseInt(strYr);
	if (pos1==-1 || pos2==-1)
	{
		alert('The date format should be : mm/dd/yyyy');
		return false;
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert('Please enter a valid month')
		return false;
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month])
	{
		alert('Please enter a valid day');
		return false;
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear)
	{
		alert('Please enter a valid 4 digit year between '+minYear+' and '+maxYear);
		return false;
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false)
	{
		alert('Please enter a valid date');
		return false;
	}
return true;
}

function validate()
   {
   var appName=document.enquiryForm.appName.value; 
   var mobPhone=document.enquiryForm.mobPhone.value;
   var aliaspos=document.enquiryForm.email.value.indexOf('@');
   var dotpos=document.enquiryForm.email.value.lastIndexOf('.');
   var address=document.enquiryForm.address.value;
   var postCode=document.enquiryForm.postCode.value;
   var town=document.enquiryForm.town.value;
   var state=document.enquiryForm.state.value;
   var country=document.enquiryForm.country.value;
   
   var qualification=false;
   
   var appDayInd = document.enquiryForm.appDay.selectedIndex;
   var appMonthInd = document.enquiryForm.appMonth.selectedIndex;
   var appYearInd = document.enquiryForm.appYear.selectedIndex;
   
   var appDay = document.enquiryForm.appDay.options[appDayInd].value;
   var appMonth = document.enquiryForm.appMonth.options[appMonthInd].value;
   var appYear = document.enquiryForm.appYear.options[appYearInd].value;
   
   var appDate = appMonth+'/'+appDay+'/'+appYear; 
   
   var appHourInd = document.enquiryForm.appHour.selectedIndex;
   var appMinInd = document.enquiryForm.appMin.selectedIndex;
   
   var appHour = document.enquiryForm.appHour.options[appHourInd].value;
   var appMin = document.enquiryForm.appMin.options[appMinInd].value;
   
   var appTime = appHour+':'+appMin; 
   
   var programme = "";
   
   if (appName == '')
   {
   	alert('Please enter your name.');
   	return false;
   }
   
   if (mobPhone == '')
   {
   	alert('Please enter your contact No.');
   	return false;
   }
     
   if (aliaspos == -1 || dotpos==-1)
   {
   alert('Please enter a valid email');
   return false;
   }
   
   if (address == '')
   {
   	alert('Please enter your address');
   	return false;
   }
   
   if (postCode == '')
   {
   	alert('Please enter your address postcode');
   	return false;
   }
   
   if (town == '')
   {
   	alert('Please enter your address town');
   	return false;
   }
   
   if (state == '')
   {
   	alert('Please enter your address state');
   	return false;
   }
   
   if (country == '')
   {
   	alert('Please select your address country');
   	return false;
   }
   
   for (counter = 0; counter < document.enquiryForm.qualification.length; counter++)
   {
   	if (document.enquiryForm.qualification[counter].checked)
	qualification = true; 
   }
   
   if (!qualification)
   { 
	alert('Please select your qualification.')
	return (false);
   }
   
   if (document.enquiryForm.qualification[document.enquiryForm.qualification.length-1].checked)
   {
	   var others = document.enquiryForm.others.value;
	   
	   if (others == '')
	   {
		   alert('Please select your qualification.');
   		   return false;
	   }
	   else
	   {
	   		document.enquiryForm.othersValue.value = others;
	   }
   }
   
   for (counter = 0; counter < document.enquiryForm.programme.length; counter++)
   {
   	if (document.enquiryForm.programme[counter].checked)
	{
		programme = programme + document.enquiryForm.programme[counter].value + "<br>";
	}
	document.enquiryForm.programmeValue.value = programme;
   }
   
   if (document.enquiryForm.appointCheck.checked)
   {
	if (isDate(appDate)==false)
	{
		//dt.focus();
		return false;
	}
	else
	{
		document.enquiryForm.appDate.value = appDate;
		document.enquiryForm.appTime.value = appTime;
	}
   }
    return true;
   }