// JavaScript Validation 
	//(put under close head tag)
	//<script language="JavaScript" type="text/JavaScript"></script
    //<script SRC="email_check.js"></script
	//(put in form tag)onsubmit="return validateForm(this)" 

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;
}

//validation for text fields
function validRequired(formField,fieldLabel)
{
	var result = true;
	
	if (formField.value == "")
	{
		alert('Please enter a value for the "' + fieldLabel +'" field.');
		formField.focus();
		result = false;
	}
	
	return result;
}

function allDigits(str)
{
	return inValidCharSet(str,"0123456789");
}


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;
}

//start email validation
function validEmail(formField,fieldLabel,required)
{
	var result = true;
	
	if (required && !validRequired(formField,fieldLabel))
		result = false;

	if (result && ((formField.value.length < 3) || !isEmailAddr(formField.value)) )
	{
		alert("Please enter a complete e-mail address in the form: yourname@yourdomain.com");
		formField.focus();
		result = false;
	}
   
	return result;

}
//end email validation


 
function validNum(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result)
 	{
 		if (!allDigits(formField.value))
 		{
 			alert('Please enter numbers 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,10);
 		if (isNaN(num))
 		{
 			alert('Please enter numbers for the "' + fieldLabel +'" field.');
			formField.focus();		
			result = false;
		}
	} 
	
	return result;
}


//validate Birthday or date mm/dd/yyyy
function validDate(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result)
 	{
 		var elems = formField.value.split("/");
 		
 		result = (elems.length == 3); // should be three components
 		
 		if (result)
 		{
 			var month = parseInt(elems[0],10);
  			var day = parseInt(elems[1],10);
 			var year = parseInt(elems[2],10);
			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 MM/DD/YYYY for the "' + fieldLabel +'" field.');
			formField.focus();		
		}
	} 
	
	return result;
}


//Start radio button
function validRadio(formField,fieldLabel) 
{ 
	var result = true; 
	var radioSelected; 

	for (var i=0; i<formField.length; i++){ 
	if (formField[i].checked) { 
	radioSelected = formField[i].value 
	} 
	} 
	if (!radioSelected){ 
	alert('Please select an option for "' + fieldLabel +'".'); 
	//formField.focus(); 
	result = false; 
	} 

	return result; 
} 
//End radio button




function validateForm(theForm)
{
// Customize these calls for your form

// Start ------->

	if (!validRequired(theForm.firstname,"First Name"))
		return false;
	if (!validRequired(theForm.lastname,"Last Name"))
		return false;
	if (!validInt(theForm.zip,"Zip Code"))
		return false;
	if (!validEmail(theForm.email,"Valid Email Address"))
		return false;
		
	
 
// <--------- End
	
	return true;
}