// JavaScript Document
function checkName (strng) {
	
	var error="";
if (strng == "") {
   error = "You didn't enter a name.\n";
}
else{

    var illegalChars = /[\W\x20]+$/; // allow letters, numbers, and underscores
  if (illegalChars.test(strng)) {
    error = "The name contains illegal characters.\n";
    }
}
return error;
}


function checkContact (strng) {
	var error="";
if (strng == "") {
   error = "You didn't enter a Contact.\n";
}
else{
    var illegalChars = /[\W\x20]+$/; // allow letters, numbers, and underscores
	
  
  if (illegalChars.test(strng)) {
    error = "The Contact contains illegal characters.\n";
    }
}
return error;
}


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;    
}


function checkRadioTabl(checkvalue) {
var error = "";
   if (!(checkvalue)) {
       error = "Please check a radio button for Table and Chairs.\n";
    }
return error;
}

function checkRadioPower(checkvalue) {
var error = "";
   if (!(checkvalue)) {
       error = "Please check a radio button for Power.\n";
    }
return error;
}

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.\n";
  
    }
    else if (!(stripped.length == 10)) {
	error = "The phone number is the wrong length. Make sure you included an area code.\n";
    } 
}
return error;
}