// email

function checkEmail (strng) {
var error="";
if (strng == "") {
   error = "You didn't enter an email address.\n";
}
else
{

    var emailFilter=/^.+@.+\..{2,3}$/;
    if (!(emailFilter.test(strng))) { 
       error = "Please enter a valid email address.\n";
    }
    else {
//test email for illegal characters
       var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/
         if (strng.match(illegalChars)) {
          error = "The email address contains illegal characters.\n";
       }
    }
}
return error;    
}


// phone number - strip out delimiters and check for 10 digits

function checkPhone (strng) {
var error = "";
if (strng == "") 
{
   error = "You didn't enter a phone number.\n";
}
else
{

	var stripped = strng.replace(/[\(\)\.\-\ ]/g, ''); //strip out acceptable non-numeric characters
    if (isNaN(parseInt(stripped))) 
	{
       error = "The phone number contains illegal characters.";
    }
	else if ((stripped.length < 10)) 
	{
		error = "The phone number is too short. Make sure you included an area code.\n";
    } 
}
return error;
}

// phone number - strip out delimiters and check for 10 digits

function checkMobile (strng) {
var error = "";
if (strng == "") 
{
   error = "You didn't enter a mobile phone number.\n";
}
else
{

	var stripped = strng.replace(/[\(\)\.\-\ ]/g, ''); //strip out acceptable non-numeric characters
    if (isNaN(parseInt(stripped))) 
	{
       error = "The mobile number contains illegal characters.";
    }
	else if ((stripped.length < 10)) 
	{
		error = "The mobile number is too short. Make sure you included the full number.\n";
    } 
}
return error;
}