<!-- 

function test() {
	alert ('test');
	return true;
}


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

		var emailFilter=/^.+@.+\.edu$/;
		if (!(emailFilter.test(strng))) { 
		   error = "Please enter a valid .edu 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 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;    
}


// date: strip out delimiters and check for 6 digits

function checkDate (strng, fieldname) {
var error = "";
if (strng == "") {
   error = "You didn't enter a " + fieldname + ".\n";
}

var stripped = strng.replace(/[\.\-\ \\\/]/g, ''); //strip out acceptable non-numeric characters
    if (isNaN(parseInt(stripped))) {
       error = "The " + fieldname + " contains illegal characters.";
  
    }
    if (!(stripped.length == 6)) {
	error = "The " + fieldname + " format is incorrect. Correct format is MM/DD/YY.\n";
    } 
return error;
}

function isNumber (strng, fieldname) {
	var error = "";
	if (strng == "") {
	   error = "You didn't enter a " + fieldname + ".\n";
	}
    var numberFilter=/^[\d-.]*$/;
    if (!(numberFilter.test(strng))) { 
       error = fieldname + " can only contain numbers.\n";
    }

	/*
	var stripped = strng.replace(/[\(\)\.\-\ ]/g, ''); //strip out acceptable non-numeric characters
    if (isNaN(parseInt(stripped))) {
       error = fieldname + " can only contain numbers.\n";
  
    }
	*/

	return error;
}

function isPositive (strng, fieldname) {
	var error = "";
	if (!(strng > 0)) {
	   error = fieldname + " must be a positive number.\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";
}

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 == 10)) {
	error = "The phone number is the wrong length. Make sure you included an area code.\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";
    }
    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";
    }  
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";
    }
    else if (illegalChars.test(strng)) {
    error = "The username contains illegal characters.\n";
    } 
return error;
}       

// make sure start_date preceeds end_date
function dateOrder(start_date, end_date) {
	var error = "";
	var start = parseInt(start_date.replace(/[\.\-\ \\\/]/g, '')); //strip out acceptable non-numeric characters
	var end = parseInt(end_date.replace(/[\.\-\ \\\/]/g, '')); //strip out acceptable non-numeric characters
	  if (start > end) {
		 error = "Start date must be before end date.\n";
	  }
	return error;	  
}


// non-empty textbox

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

// make sure box is checked
function isChecked(checkbox, error_message) {
var error = "";
    if (checkbox == false) {
    error = error_message;
    }    
return error;
}    

-->