/* Use the function validateForm(theForm) for your calls on the page (commented 
out at the end of this file)

-validRequired(formField, fieldLabel) -- checks for a field being empty
-validEmail(formField, fieldLabel, required) -- checks for a correctly formatted email address
-validNum(formField, fieldLabel, required) -- checks for a valid number (a string where all the characters are digits)
-validInt(formField, fieldLabel, required) -- checks for a number (integer) that can be correctly parsed with the function parseInt
-validDate(formField, fieldLabel, required) -- checks for a correctly formatted date 

The parameters to these functions are defined as:
-formField -- the document reference to your form field (e.g., myform.fieldName)
-fieldLabel -- the user friendly string that you want the error message to refer to your field by
-required -- whether the field is required to be filled in by the user (true/false) 
*/
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;
}

function validRequired(formField,fieldLabel)
{
	var result = true;
	
	if (formField.value == "")
	{
		alert('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;
}

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("Enter a valid email address (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('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,10);
 		if (isNaN(num))
 		{
 			alert('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)
 	{
 		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('Ender a date in the format MM/DD/YYYY for the "' + fieldLabel +'" field.');
			formField.focus();		
		}
	} 
	
	return result;
}

/*function validateForm(theForm)
{
	//This is the function that gets the call to test stuff
	//Put this into the same page that you want tested
	//On the form use the onsubmit="return validateForm(this)"

	// Start ------->
	if (!validRequired(theForm.salut,"Salutation", true))
		return false;

	if (!validRequired(theForm.fname,"First Name", true))
		return false;
	
	if (!validRequired(theForm.lname,"Last Name", true))
		return false;

	if (!validEmail(theForm.email,"Email Address",true))
		return false;

	if (!validRequired(theForm.adress,"Address", true))
		return false;

	if (!validRequired(theForm.city,"City", true))
		return false;

	if (!validRequired(theForm.state,"State", true))
		return false;
	
	if (!validInt(theForm.zip,"Zip",true))
		return false;

	// <--------- End
	
	return true;
}*/