// JavaScript Document


// email

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


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

function checkPhone (strng) {
var error = "";
if (strng == "" || strng == null) {
   error = "Please Enter Phone Number.\n\n";
}

var stripped = strng.replace(/[\(\)\.\-\ ]/g, ''); //strip out acceptable non-numeric characters
var illegalLetters = /[a-zA-Z]/;

if (isNaN(parseInt(stripped))) {
       error = "Please Enter a VALID Phone Number.";
  
    }
    if (!(stripped.length == 10)) {
	error = "Please Enter a Valid Phone Number. Make sure you included an area code.\n\n";
    }  
	else if (illegalLetters.test(strng)) {
		error = "Phone should not contain letters.\n\n";
	}
return error;
}

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

function checkFax (strng) {
var error = "";
if (strng == "") {
   error = "Please Enter Fax Number.\n\n";
}

var stripped = strng.replace(/[\(\)\.\-\ ]/g, ''); //strip out acceptable non-numeric characters
var illegalLetters = /[a-zA-Z]/;

    if (isNaN(parseInt(stripped))) {
       error = "Please Enter a VALID Fax Number.";
  
    }
    if (!(stripped.length == 10)) {
		error = "Please Enter a Valid Fax Number. Make sure you included an area code.\n\n";
    } 
	else if (illegalLetters.test(strng)) {
		error = "Fax should not contain letters.\n\n";
	}
	
return error;
}


// password - between 6-8 chars, uppercase, lowercase, and numeral

function checkPassword (strng) {
var error = "";
if (strng == "") {
   error = "Please Enter a Password.\n\n";
}

    var illegalChars = /[\W_]/; // allow only letters and numbers
    var illegalNum = /\d/;  // allow numbers
	
    if ((strng.length < 5) || (strng.length > 10)) {
       error = "Your Password should be 5 to 10 characters in length.\n\n";
    }
	else if (!(illegalNum.test(strng))) {
       error = "The password must contain at least one number.\n\n";
    }  
    else if (illegalChars.test(strng)) {
      error = "The password contains illegal characters.\n\n";
    } 

return error;    
}    

// Name - chars, uc, lc, and underscore only.

function checkName (strng) {
var error = "";
if (strng == "") {
   error = "Please Enter Name.\n\n";
}

	var illegalChars = /\W\s\./; // allow letters, numbers, spaces, dots and underscores 
	if (illegalChars.test(strng)) {
    error = "Your Name contains illegal characters.\n\n";
    } 
return error;
}  

// Company - chars, uc, lc, and underscore only.

function checkCompany (strng) {
var error = "";
if (strng == "") {
   error = "Please Enter Company Name.\n\n";
}


    var illegalChars = /\W\s\./; // allow letters, numbers, and underscores
    if (illegalChars.test(strng)) {
    error = "The Company Name contains illegal characters.\n\n";
    } 
return error;
}  


// username - 4-10 chars, uc, lc, and underscore only.

function checkUsername (strng) {
var error = "";
if (strng == "") {
   error = "Please Enter a Username.\n\n";
}


    var illegalChars = /\W/; // allow letters, numbers, and underscores
    if ((strng.length < 5) || (strng.length > 10)) {
       error = "Your Username should be 5 to 10 characters in length.\n\n";
    }
    else if (illegalChars.test(strng)) {
    error = "The username contains illegal characters.\n\n";
    } 
return error;
}       


// non-empty textbox

function isEmpty(strng) {
var error = "";
  if (strng.length == 0) {
     error = "The mandatory text area has not been filled in.\n\n"
  }
return error;	  
}

// was textbox altered

function isDifferent(strng) {
var error = ""; 
  if (strng != "Can\'t touch this!") {
     error = "You altered the inviolate text area.\n\n";
  }
return error;
}

// exactly one radio button is chosen

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

// valid selector from dropdown list

function checkDropdown(choice) {
var error = "";
    if (choice == 0) {
    error = "Please choose an option from the drop-down list.\n\n";
    }    
return error;
}