// JavaScript Document

function validateFormOnSubmit(theForm) 
{
  var reason = "";
  reason += validateUsername(theForm.element_1);
  reason += validatecompname(theForm.element_2);
  reason += validateEmail(theForm.element_3);
  reason += validatePhone(theForm.element_4);
      
  if (reason != "") {
    alert("Some fields need correction:\n" + reason);
    return false;
  }
  else
  {
return true;
  }
}
function validateEmpty(fld) {
    var error = "";
 
    if (fld.value.length == 0) {
        fld.style.background = 'Red'; 
        error = "The required field has not been filled in.\n"
    } else {
        fld.style.background = 'White';
    }
    return error;  
}

//code to validate first name
function validateUsername(fld) {
    var error = "";
    var illegalChars = /\W/; // allow letters, numbers, and underscores
 
    if (fld.value == "") {
        fld.style.background = 'Red'; 
        error = "Please enter your First Name.\n";
		fld.focus();
    } else if ((fld.value.length < 5) || (fld.value.length > 15)) {
        fld.style.background = 'Yellow'; 
        error = "The Name is the wrong length.Min length is 5 and Max is 15.\n";
		fld.focus();
    } else if (illegalChars.test(fld.value)) {
        fld.style.background = 'Yellow'; 
        error = "Only Alphbetic charachters allowed.\n";
		fld.focus();
    } else {
        fld.style.background = 'White';
    }
    return error;
}//end of first name validation

function validatecompname(fld) {
    var error = "";
    var illegalChars = /\W/; // allow letters, numbers, and underscores
 
    if (fld.value == "") {
        fld.style.background = 'Red'; 
        error = "Please enter your Company Name.\n";
		fld.focus();
    } else if ((fld.value.length < 5) || (fld.value.length > 15)) {
        fld.style.background = 'Yellow'; 
        error = "The Name is the wrong length.Min length is 5 and Max is 15.\n";
		fld.focus();
    } else if (illegalChars.test(fld.value)) {
        fld.style.background = 'Yellow'; 
        error = "Only Alphbetic charachters allowed.\n";
		fld.focus();
    } else {
        fld.style.background = 'White';
    }
    return error;
}

function validatePassword(fld) {
    var error = "";
    var illegalChars = /[\W_]/; // allow only letters and numbers 
 
    if (fld.value == "") {
        fld.style.background = 'Yellow';
        error = "You didn't enter a password.\n";
		fld.focus();
    } else if ((fld.value.length < 7) || (fld.value.length > 15)) {
        error = "The password is the wrong length. \n";
		fld.focus();
        fld.style.background = 'Yellow';
    } else if (illegalChars.test(fld.value)) {
        error = "The password contains illegal characters.\n";
		fld.focus();
        fld.style.background = 'Yellow';
    } else if (!((fld.value.search(/(a-z)+/)) && (fld.value.search(/(0-9)+/)))) {
        error = "The password must contain at least one numeral.\n";
		fld.focus();
        fld.style.background = 'Yellow';
    } else {
        fld.style.background = 'White';
    }
   return error;
}  
function trim(s)
{
  return s.replace(/^\s+|\s+$/, '');
}
function validateEmail(fld) {
    var error="";
    var tfld = trim(fld.value);                        // value of field with whitespace trimmed off
    var emailFilter = /^[^@]+@[^@.]+\.[^@]*\w\w$/ ;
    var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/ ;
   
    if (fld.value == "") {
        fld.style.background = 'Red';
        error = "Please enter Email-address.\n";
		fld.focus();
    } else if (!emailFilter.test(tfld)) {              //test email for illegal characters
        fld.style.background = 'Yellow';
        error = "Please enter a valid email address.\n";
		fld.focus();
    } else if (fld.value.match(illegalChars)) {
        fld.style.background = 'Yellow';
        error = "The email address contains illegal characters.\n";
		fld.focus();
    } else {
        fld.style.background = 'White';
    }
    return error;
}
function validatePhone(fld) {
    var error = "";
    var stripped = fld.value.replace(/[\(\)\.\-\ ]/g, '');    

   if (fld.value == "") {
        error = "Please enter Phone No.\n";
		fld.focus();
        fld.style.background = 'Red';
    } else if (isNaN(parseInt(stripped))) {
        error = "The phone number contains illegal characters.\n";
		fld.focus();
        fld.style.background = 'Yellow';
    } else if (!(stripped.length == 10)) {
        error = "The phone number is the wrong length. Make sure you included an area code.\n";
		fld.focus();
        fld.style.background = 'Yellow';
    }
    return error;
}