
<!-- Email Validation -->

function isEmailAddr(email) {
  var result = false;
  var theStr = new String(email);
  var index = theStr.indexOf("@");
  if (index > 0) {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
	result = true;
  }
  return result;
}

<!-- Empty Form Field Vaidation -->
function fieldEmpty(formField) {
	var result = true;
	
	if (formField.value == ""){
		result = false;
	}	
	return result;
}

<!-- Selection field -->
function validSelection(formField,fieldLabel){
	var result = true;
	
	if (formField.options[0].selected) {
		alert('Please select a value for the "' + fieldLabel +'" field.');
		formField.focus();
		result = false;
	}	
	return result;
}

<!-- Check box Validation -->
function validCheckbox(formField,fieldLabel) {
	var result = true;
	
	if (! formField.checked) {
		alert('Please select the "' + fieldLabel +'" field.');
		formField.focus();
		result = false;
	}	
	return result;
}

<!-- Search Box Validation -->
function validRequired(formField,fieldLabel){
	var result = true;
	
	if (formField.value == "") {
		alert('Please enter atleast one keyword for  "' + fieldLabel +'" field.');
		formField.focus();
		result = false;
	}	
	return result;
}

<!-- Text Box Validation -->
function validRequired1(formField,fieldLabel){
	var result = true;
	
	if (formField.value == "") {
		alert('Please enter your "' + fieldLabel +'" field.');
		formField.focus();
		result = false;
	}	
	return result;
}

<!-- username  Validation -->
function validRequired2(formField,fieldLabel){
	var result = true;
	
	if (formField.value == "") {
		alert('You have entered an incorrect "' + fieldLabel +'" field.');
		formField.focus();
		result = false;
	}	
	return result;
}



<!-- Digits validation -->
function allDigits(str) {
	return inValidCharSet(str,"0123456789");
}

<!-- Float variables validation -->
function allFloat(str) {
	return inValidCharSet(str,"0123456789.");
}

<!-- Character set validation -->
function inValidCharSet(str,charset){
	var result = true;

	// Note: doesn't use regular expressions to avoid early Mac browser bugs	
	for (var i=0;i<str.length;i++)
		if (charset.indexOf(str.substr(i,1))<0)	{
			result = false;
			break;
		}
	
	return result;
}

<!-- Email 2 validation -->
function validEmail(formField,fieldLabel,required) {
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;

	if (required)	{
		if (result && ((formField.value.length < 3) || !isEmailAddr(formField.value)) )	{
			alert("Please enter a complete email address in the form: yourname@yourdomain.com");
			formField.focus();
			result = false;
		}
	}
   
  return result;
}

function validNum(formField,fieldLabel,required) {
	var result = true;
	
	if (required && !validRequired(formField,fieldLabel))
		result = false;

	if (result)	{
 		if (!allDigits(formField.value)) {
 			alert('Please enter a number for the "' + fieldLabel +'" field.');
			formField.focus();		
			result = false;
		}
	} 
	return result;
}


function validInt(formField,fieldLabel,required) {
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result)	{
 		var num = parseInt(formField.value);
 		if (isNaN(num))	{
 			alert('Please enter a number for the "' + fieldLabel +'" field.');
			formField.focus();		
			result = false;
		}
	} 
	return result;
}


function validDate(formField,fieldLabel,required) {
	var result = true;
	if (required && !validRequired(formField,fieldLabel)) 
		result = false;

	if (result)	{
 		if (formField.value){
			var elems = formField.value.split("/");
 		
 			result = (elems.length == 3); // should be three components
 		
 			if (result)	{
 				//var day = parseInt(elems[0]);
				var day = elems[0];
  			var month = elems[1];
 				var year = parseInt(elems[2]);
				
				result = allDigits(elems[0]) && (month > 0) && (month < 13) &&
					 allDigits(elems[1]) && (day > 0) && (day < 32) &&
					 allDigits(elems[2]) && ((elems[2].length == 2) || (elems[2].length == 4));
 			}
		}

  	if (!result) {
 			alert('Please enter a date in the format DD/MM/YYYY for the "' + fieldLabel +'" field.');
			formField.focus();		
		}
	} 
	return result;
}

function validRadioSelected(formField,fieldLabel) {
	var radio_choice = false;
	for (counter = 0; counter < formField.length; counter++) {
		if (formField[counter].checked)
			radio_choice = true; 
	}

	if (!radio_choice) {
		alert('Please select a option for "' + fieldLabel + '" field.');
	} 
	return radio_choice;
}

function validFloat(formField,fieldLabel, required) {
	var result = true;
	
	if (required && !validRequired(formField,fieldLabel))
		result = false;

	if (result)	{
 		if (!allFloat(formField.value)) {
 			alert('Please enter a number for the "' + fieldLabel +'" field.');
			formField.focus();		
			result = false;
		}
	} 
	return result;
}

//Function to be changed to accept multiple extension. Now it supports only two extensions. 

function validFileType(formField, ext1, ext2, fieldLabel, required) {
	var result = true;
	if (required && !validRequired(formField,fieldLabel))
		result = false;
	
	if (result)	{
		if (formField.value){
			ext1 = ext1.toLowerCase();
			ext2 = ext2.toLowerCase();
			var formValue = formField.value.toLowerCase();
			
			if ((formValue.indexOf('.' + ext1) == -1) & (formValue.indexOf('.' + ext2) == -1)) {
				alert('Please submit ".' + ext1 + " / ." + ext2  + '" type files only for the "' + fieldLabel +'" field.');
				formField.focus();
				result =  false;
			}
		}
	}
	return result;
}