// JavaScript Document

function checkLogin(theForm) {
    var why = "";
    //why += checkEmail(theForm.email.value);
    //why += checkPhone(theForm.phone.value);
    why += checkUsername(theForm.username.value);
    why += checkPassword(theForm.password.value);
    //why += isEmpty(theForm.notempty.value);
    //why += isDifferent(theForm.different.value);
    //for (i=0, n=theForm.radios.length; i<n; i++) {
    //    if (theForm.radios[i].checked) {
    //        var checkvalue = theForm.radios[i].value;
    //       break;
    //    } 
    //}
    //why += checkRadio(checkvalue);
    //why += checkDropdown(theForm.choose.selectedIndex);
    if (why != "") {
       alert(why);
       return false;
    }
return true;
}

function checkPhones(theForm) {

	if (checkHPhone(theForm) == "") {return true;}
	else if (checkWPhone(theForm) == "") {return true;}
	else if (checkMPhone(theForm) == "") {return true;}
	else {alert(checkHPhone(theForm));return false;}
}

function checkHPhone(theForm) {
    var why = "";
    why += checkPhone(theForm.hnumber.value);
    //if (why != "") {
    //   alert(why);
    //   return false;
    //}
//return true;
return why;
}

function checkWPhone(theForm) {
    var why = "";
    why += checkPhone(theForm.wnumber.value);
    //if (why != "") {
    //   alert(why);
    //   return false;
    //}
//return true;
return why;
}

function checkMPhone(theForm) {
    var why = "";
    why += checkPhone(theForm.mnumber.value);
    //if (why != "") {
    //   alert(why);
    //   return false;
    //}
//return true;
return why;
}

// email

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

    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";
   error = "Please enter a vaild phone number between 8 and 10 digits.\n";
}

var stripped = strng.replace(/[\(\)\.\-\ ]/g, ''); //strip out acceptable non-numeric characters
    //if (isNaN(parseInt(stripped))) {
    //   error = "The phone number contains illegal characters.";
  
    //}
    if (!(stripped.length > 7) && !(stripped.length < 11)) {
	//error = "The phone number is the wrong length. Make sure you included an area code.\n";
   error = "Please enter a vaild phone number between 8 and 10 digits.\n";
    } 
return error;
}


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

function checkPassword (strng) {
var error = "";
if (strng == "") {
   error = "You didn't enter a password.\n";
}

    var illegalChars = /[\W_]/; // allow only letters and numbers
    
//    if ((strng.length < 6) || (strng.length > 8)) {
//       error = "The password is the wrong length.\n";
//    }
    if (strng.length < 6) {
       error = "The password is too short.\n";
    }
    else if (illegalChars.test(strng)) {
      error = "The password contains illegal characters.\n";
    } 
//    else if (!((strng.search(/(a-z)+/)) && (strng.search(/(A-Z)+/)) && (strng.search(/(0-9)+/)))) {
//       error = "The password must contain at least one uppercase letter, one lowercase letter, and one numeral.\n";
//    }  
    else if (!((strng.search(/(a-z)+/)) && (strng.search(/(0-9)+/)))) {
       error = "The password must contain at least one letter and one numeral.\n";
    }  
return error;    
}    


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

function checkUsername (strng) {
var error = "";
if (strng == "") {
   error = "You didn't enter a username.\n";
}


    var illegalChars = /\W/; // allow letters, numbers, and underscores
//    if ((strng.length < 4) || (strng.length > 10)) {
//       error = "The username is the wrong length.\n";
//    }
    if (strng.length < 4) {
       error = "The username is too short";
    }
    else if (illegalChars.test(strng)) {
    error = "The username contains illegal characters.\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"
  }
return error;	  
}

// was textbox altered

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

// exactly one radio button is chosen

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

// valid selector from dropdown list

function checkDropdown(choice) {
var error = "";
    if (choice == 0) {
    error = "You didn't choose an option from the drop-down list.\n";
    }    
return error;
}