//Validate forms

// Checks to see if form element is empty 
function isEmpty(val){
	if (val.match(/^s+$/) || val==''){
		return true;
	}
	else{
		return false;
	} 
}



function isDigit(n) { //check it is digit or not
	if((n < "0") || ("9" < n)) {
		return false
	} 
	else {
		return true
	}
}


function isInteger(val){ //check it is interger or not
	for(var i=0;i<val.length;i++){
		if(!isDigit(val.charAt(i))){return false;}
	}
	return true;
}

//---------------------------------------- validate date
var dtCh= "-";
var minYear=1800;
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,disyplay_error_element){
	
	
	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)
	
	/* --------- dd - mm - yyyy --------------*/
	var strDay=dtStr.substring(0,pos1)
	var strMonth=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1) 


	/* --------- yyyy-mm-dd --------------*/
	/* var strYear=dtStr.substring(0,pos1)
	var strMonth=dtStr.substring(pos1+1,pos2)
	var strDay=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")
		document.getElementById(disyplay_error_element).innerHTML+="The date format should be : dd-mm-yyyy";
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		document.getElementById(disyplay_error_element).innerHTML+="Please enter a valid month!";
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		document.getElementById(disyplay_error_element).innerHTML+="Please enter a valid day!";
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		document.getElementById(disyplay_error_element).innerHTML+="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){
		document.getElementById(disyplay_error_element).innerHTML+="Please enter a valid date";
		return false
	}
return true
}

function check_date(field,disyplay_error_element){
	if (isDate(field.value,disyplay_error_element)==false){
		field.focus()
		field.select();
		return false
	}
	document.getElementById(disyplay_error_element).innerHTML="";
    return true
 }
//--------------------------- end validate date


//--------------------------- validate email
function isValidEmail(email, required) {
    if (required==undefined) {   // if not specified, assume it's required
        required=true;
    }
    if (email==null) {
        if (required) {
            return false;
        }
        return true;
    }
    if (email.length==0) {  
        if (required) {
            return false;
        }
        return true;
    }
    if (! allValidChars(email)) {  // check to make sure all characters are valid
        return false;
    }
    if (email.indexOf("@") < 1) { //  must contain @, and it must not be the first character
        return false;
    } else if (email.lastIndexOf(".") <= email.indexOf("@")) {  // last dot must be after the @
        return false;
    } else if (email.indexOf("@") == email.length) {  // @ must not be the last character
        return false;
    } else if (email.indexOf("..") >=0) { // two periods in a row is not valid
	return false;
    } else if (email.indexOf(".") == email.length) {  // . must not be the last character
	return false;
    }
    return true;
}

function allValidChars(email) {
  var parsed = true;
  var validchars = "abcdefghijklmnopqrstuvwxyz0123456789@.-_";
  for (var i=0; i < email.length; i++) {
    var letter = email.charAt(i).toLowerCase();
    if (validchars.indexOf(letter) != -1)
      continue;
    parsed = false;
    break;
  }
  return parsed;
}


/*------------------------------------------------------------------*/

function checkDate(frm){
	
	//var KeyID = event.keyCode;
	//alert(KeyID);
	if((frm.dateofbirth.value.length==2) || (frm.dateofbirth.value.length==5)){
		frm.dateofbirth.value = frm.dateofbirth.value + "-";
	}
	/* if(KeyID<48 || KeyID>57){
		if(KeyID!=8 && KeyID!=46 && KeyID!=38 && KeyID!=37 && KeyID!=39 && KeyID!=40){
			alert("Please enter valid date of birth");
			frm.value = frm.value.substring(frm.value.length-1);
		}
	} */
	
}

function checkDate1(frm){

	if((frm.temp_date.value.length==2) || (frm.temp_date.value.length==5)){
		frm.temp_date.value = frm.temp_date.value + "-";
	}	
}

function checkDateAll(frm){

	if((frm.value.length==2) || (frm.value.length==5)){
		frm.value = frm.value + "-";
	}	
}

function checkEmergencyno(frm){
	if((isEmpty(frm.rel_mobile.value)) && (isEmpty(frm.em_telno.value))){
		alert("Please enter your emergency mobile or telephone number");
		frm.em_telno.focus();
	}
}

function validateForm1(frm){
	
	document.getElementById("errormsg").innerHTML = "";
		
	if(isEmpty(frm.dateofbirth.value)){
		document.getElementById("errormsg").innerHTML = "Please enter date of birth";
		return false;
	}
	
	if(!isDate(frm.dateofbirth.value,"errormsg")){
		return false;
	}
	
	if(isEmpty(frm.age.value)){
		document.getElementById("errormsg").innerHTML = "Please enter age";
		return false;
	}
	if(!isInteger(frm.age.value)){
		document.getElementById("errormsg").innerHTML = "Please enter valid age";
		return false;
	}
	if((frm.age.value<1) || (frm.age.value>150)){
		document.getElementById("errormsg").innerHTML = "Please enter valid age";
		return false;
	}

	if(isEmpty(frm.curent_add.value)){
		document.getElementById("errormsg").innerHTML = "Please enter your current address";
		return false;
	}
	if(isEmpty(frm.town.value)){
		document.getElementById("errormsg").innerHTML = "Please enter town";
		return false;
	}
	
	
	if(isEmpty(frm.tel_home.value)  && isEmpty(frm.tel_mobile.value)){
		document.getElementById("errormsg").innerHTML = "Please enter your mobile or telephone number";
		return false;
	}

	if(isEmpty(frm.em_contact.value)){
		document.getElementById("errormsg").innerHTML = "Please enter emergency  contact name";
		return false;
	}
	if(isEmpty(frm.em_relationship.value)){
		document.getElementById("errormsg").innerHTML = "Please enter emergency relationship";
		return false;
	}
	if(isEmpty(frm.em_telno.value)){
		document.getElementById("errormsg").innerHTML = "Please enter your emergency telephone number";
		return false;
	}
		
	if(frm.ad_pass_date.value!=""){
		document.getElementById("errormsg").innerHTML = "Issue date: ";
		if(!isDate(frm.ad_pass_date.value,"errormsg")){
			return false;
		}
	}
	if(frm.ad_driv_validdate.value!=""){
		document.getElementById("errormsg").innerHTML = "Licence valid date: ";
		if(!isDate(frm.ad_driv_validdate.value,"errormsg")){
			return false;
		}
	}
	if(frm.ad_mar_cer_date.value!=""){
		document.getElementById("errormsg").innerHTML = "Marriage certificate issue: ";
		if(!isDate(frm.ad_mar_cer_date.value,"errormsg")){
			return false;
		}
	}

	return true;
}


function validateForm2(frm){

	if((frm.fulltime[1].checked==true) && isEmpty(frm.part_time.value)){
		document.getElementById("errormsg").innerHTML = "If part-time, which days are you  available?";
		return false;
	}
	
	if((frm.agency[0].checked==true) && isEmpty(frm.agency_yes.value)){
		document.getElementById("errormsg").innerHTML = "Please enter other agencies name";
		return false;
	}
	
	if(frm.prefer_date.value!=""){
		document.getElementById("errormsg").innerHTML = "Preferred  Start: ";
		if(!isDate(frm.prefer_date.value,"errormsg")){
			return false;
		}
	}
		
	document.getElementById("errormsg").innerHTML = "";
	
	return true;
}


function validateForm3(frm){
	
	//validate atleast one education details
	/* if(isEmpty(frm.ed_univ1.value) || isEmpty(frm.ed_univ1_date_from.value) || isEmpty(frm.ed_univ1_date_to.value) || isEmpty(frm.ed_univ1_courses.value) || isEmpty(frm.ed_univ1_quali.value)){
		document.getElementById("errormsg").innerHTML = "Please provide details your post-secondary educational qualifications along with a copy of your professional qualifications";
		return false;
	}
	
	if(isEmpty(frm.ex_organisation1.value) || isEmpty(frm.ex_org_from1.value) || isEmpty(frm.ex_org_to1.value) || isEmpty(frm.ex_grade1.value) || isEmpty(frm.ex_salary1.value) || isEmpty(frm.ex_leave_reason1.value)){
		document.getElementById("errormsg").innerHTML = "Please enter details of your employment";
		return false;
	}*/
	
	if((frm.cert_handling.selectedIndex==0) && isEmpty(frm.cert_handling_date.value)){
		document.getElementById("errormsg").innerHTML = "Please enter manual handling certificate date";
		return false;
	}
	if((frm.cert_hygiene.selectedIndex==0) && isEmpty(frm.cert_hygiene_date.value)){
		document.getElementById("errormsg").innerHTML = "Please enter food hygiene certificate date";
		return false;
	}
	
	if((frm.cert_health.selectedIndex==0) && isEmpty(frm.cert_health_date.value)){
		document.getElementById("errormsg").innerHTML = "Please enter health & safety certificate date";
		return false;
	}
	
	if((frm.teach_lastsixyears.selectedIndex==0)){
		if(isEmpty(frm.teach_gtc.value)){
			document.getElementById("errormsg").innerHTML = "Please Enter GTC Registration teacher";
			return false;
		}
		if(isEmpty(frm.teach_qualification.value)){
			document.getElementById("errormsg").innerHTML = "Please Enter Qualification Of teacher";
			return false;
		}
		if(isEmpty(frm.teach_type.value)){
			document.getElementById("errormsg").innerHTML = "Please Enter Type Of teacher";
			return false;
		}
	}
	
	document.getElementById("errormsg").innerHTML = "";
	return true;
}


function validateForm4(frm){

	if(isEmpty(frm.name_org.value)){
		document.getElementById("errormsg").innerHTML = "Please enter reference1 organization name";
		return false;
	}
	
	if(isEmpty(frm.name_ref.value)){
		document.getElementById("errormsg").innerHTML = "Please enter reference1 referee/title";
		return false;
	}
	
	if(isEmpty(frm.address.value)){
		document.getElementById("errormsg").innerHTML = "Please enter reference1 address";
		return false;
	}
	
	
	if(isEmpty(frm.tel_no.value)){
		document.getElementById("errormsg").innerHTML = "Please enter reference1 telephone number";
		return false;
	}
	
	
	if((frm.refree_y[0].checked==false) && (frm.refree_y[1].checked==false)){
		document.getElementById("errormsg").innerHTML = "Please check contact this referee or not";
		return false;
	}
	
	
	document.getElementById("errormsg").innerHTML = "";
	
	return true;
}


function validateForm5(frm){
	
	/* if(isEmpty(frm.Med_name.value)){
		document.getElementById("errormsg").innerHTML = "Please enter medical checklist name";
		return false;
	}
	if(isEmpty(frm.Med_add.value)){
		document.getElementById("errormsg").innerHTML = "Please enter medical checklist address";
		return false;
	}
	if(isEmpty(frm.Med_city.value)){
		document.getElementById("errormsg").innerHTML = "Please enter medical checklist city";
		return false;
	}
	if(isEmpty(frm.Med_post.value)){
		document.getElementById("errormsg").innerHTML = "Please enter medical checklist post code";
		return false;
	}
	if(isEmpty(frm.Med_tel_no.value)){
		document.getElementById("errormsg").innerHTML = "Please enter medical checklist telephone number";
		return false;
	} */
	
	/*
	if(frm.skin[0].checked==false && frm.skin[1].checked==false){
		document.getElementById("errormsg").innerHTML = "Required : Any type of skin complaint: Dermatitis; Psoriasis and Eczema";
		return false;
	}
	if(frm.allergy[0].checked==false && frm.allergy[1].checked==false){
		document.getElementById("errormsg").innerHTML = "Required : Any type of allergy: Hay Fever";
		return false;
	}
	if(frm.bowel[0].checked==false && frm.bowel[1].checked==false){
		document.getElementById("errormsg").innerHTML = "Required :Bowel infection e.g. Typhoid, cholera, Dysentery, Chronic Diarrhoea or   other bowel problems e.g. gastric ulcer; irritable bowel syndrome?";
		return false;
	}
	if(frm.heart[0].checked==false && frm.heart[1].checked==false){
		document.getElementById("errormsg").innerHTML = "Required : Heart complaint: Angina?";
		return false;
	}
	if(frm.eye[0].checked==false && frm.eye[1].checked==false){
		document.getElementById("errormsg").innerHTML = "Required : Disorders of the eye: Glaucoma, Cataracts, etc?";
		return false;
	}
	if(frm.diabetes[0].checked==false && frm.diabetes[1].checked==false){
		document.getElementById("errormsg").innerHTML = "Required : Diabetes?";
		return false;
	}
	if(frm.hepatitis[0].checked==false && frm.hepatitis[1].checked==false){
		document.getElementById("errormsg").innerHTML = "Required : Jaundice; hepatitis; blood disorders e.g. anaemia; sickle cell?";
		return false;
	}
	if(frm.respiratory[0].checked==false && frm.respiratory[1].checked==false){
		document.getElementById("errormsg").innerHTML = "Required :Asthma or other respiratory problems?";
		return false;
	}
	if(frm.refused_work[0].checked==false && frm.refused_work[1].checked==false){
		document.getElementById("errormsg").innerHTML = "Required : Have you ever been dismissed from or refused work on the grounds of health?";
		return false;
	}
	if(frm.salmonella[0].checked==false && frm.salmonella[1].checked==false){
		document.getElementById("errormsg").innerHTML = "Required :  Have you ever been informed that you are a carrier of salmonella?";
		return false;
	}
	if(frm.skin[0].checked==false && frm.skin[1].checked==false){
		document.getElementById("errormsg").innerHTML = "Required : Any type of skin complaint: Dermatitis; Psoriasis and Eczema";
		return false;
	}*/
	
	if(frm.monitor_gender[0].checked==false && frm.monitor_gender[1].checked==false){
		document.getElementById("errormsg").innerHTML = "Please select gender";
		return false;
	}
	
	if(frm.monitor_status[0].checked==false && frm.monitor_status[1].checked==false && frm.monitor_status[2].checked==false && frm.monitor_status[3].checked==false){
		document.getElementById("errormsg").innerHTML = "Please select Marital Status";
		return false;
	}
	
	if(frm.nation[0].checked==false && frm.nation[1].checked==false && frm.nation[2].checked==false && frm.nation[3].checked==false &&frm.nation[4].checked==false && frm.nation[5].checked==false && frm.nation[6].checked==false && frm.nation[7].checked==false){
		document.getElementById("errormsg").innerHTML = "Please select Nationality/Ethnicity";
		return false;
	}
	
	
	document.getElementById("errormsg").innerHTML = "";
	
	return true;
}






function validateForm6(frm){
	
	if(frm.temp_work.checked==false){
		document.getElementById("errormsg").innerHTML = "Please signed by the temporary worker ";
		frm.temp_work.focus();
		return false;
	}
	
	if(isEmpty(frm.temp_date.value)){
		document.getElementById("errormsg").innerHTML = "Please enter date";
		return false;
	}
	document.getElementById("errormsg").innerHTML ="";
	if(!isDate(frm.temp_date.value,"errormsg")){
		//document.getElementById("errormsg").innerHTML = "Please enter date";
		return false;
	}
	return true;
}