/**
 * Convert a plain-text password into one encrypted using MD5 hashing.
 *
 * @return true always.
 */
function encryptPwd(){
    document.forms["credentials"]["encPwd"].value = hex_md5(document.getElementById("password").value);
    return true;
}

/**
 * Verify the user has entered all the required fields and that the new
 * passwords match each other, then encrypt both the existing password and the
 * new passwords.
 *
 * @return true if all fields are present and correct, false otherwise.
 */
function verifyAndEncryptPwd(){
    if (document.forms["credentials"]["newpassword1"].value !=
    document.forms["credentials"]["newpassword2"].value) {
        alert("<?php echo $text['newPasswordBad'][2] ?>");
        return false;
    }
    document.forms["credentials"]["oldpassword"].value = hex_md5(document.forms["credentials"]["oldpassword"].value);
    document.forms["credentials"]["newpassword1"].value = hex_md5(document.forms["credentials"]["newpassword1"].value);
    document.forms["credentials"]["newpassword2"].value = hex_md5(document.forms["credentials"]["newpassword2"].value);
    return true;
}

var hideTimeout = new Array();
var hideTimeoutFrames = new Array();

/**
 * Returns the index into the array that will match the timer for the frame we
 * want to hide.
 *
 * @param frame
 *            the frame we want to hide
 * @return the index for the timer for when this frame should be hidden
 */
function getTimerForFrame(frame){
    timer = -1;
    for (i = 0; i < hideTimeoutFrames.length; i++) {
        if (hideTimeoutFrames[i] == frame) {
            timer = i;
        }
    }
    if (timer == -1) {
        timer = hideTimeoutFrames.length;
        hideTimeoutFrames[timer] = frame;
    }
    return timer;
}

/**
 * Requests that a DIVision be hidden after a short delay based on its ID. The
 * delay exists to stop flickering in Internet Explorer.
 *
 * @param frame
 *            the frame who's border we want to set to the background color.
 * @param contents
 *            the data to be hidden.
 * @return nothing.
 */
function hidediv(frame, contents){
    timer = getTimerForFrame(frame);
    hideTimeout[timer] = setTimeout('hidedivDelay(\'' + frame + '\', \'' +
    contents +
    '\')', 20);
}

/**
 * Hides a DIVision based on its ID, and makes it's frame the same as the
 * background (hides it without causing screen shimmer).
 *
 * @param frame
 *            the frame who's border we want to set to the background color.
 * @param contents
 *            the data to be hidden.
 * @return nothing.
 */
function hidedivDelay(frame, contents){
    document.getElementById(contents).style.visibility = 'hidden';
    document.getElementById(frame).style.border = '2px solid #a5cae5';
}

/**
 * Shows a DIVision based on its ID, and makes it's frame the same as the
 * borders within this particular layout.
 *
 * @param frame
 *            the frame who's border we want to see.
 * @param contents
 *            the data to be shown.
 * @return nothing.
 */
function showdiv(frame, contents){
    timer = getTimerForFrame(frame);
    if (hideTimeout[timer] != null) {
        clearTimeout(hideTimeout[timer]);
        hideTimeout[timer] = null;
    }
    document.getElementById(contents).style.visibility = 'visible';
    document.getElementById(frame).style.border = '2px solid #245882';
}

/**
 * Creates a visible email address that should be otherwise hidden from spiders.
 *
 * @param username the name of the user who will get the email.
 * @param tld the top level domain for the host
 * @param hostname the server that hosts the email.
 * @return nothing (output is put directly into the document).
 */
function generate_address(username, tld, hostname){
    var atsign = "&#64;";
    var addr = username + atsign + hostname + '.' + tld;
    document.write("<" + "a" + " " + "href=" + "mail" + "to:" + addr + ">" +
    addr +
    "<\/a>");
}

/**
 * Ensures that all required fields are filled in before allowing the user to
 * submit a registration request.
 *
 * @param errorMessage
 *            the language-specific error message if fields are missing
 * @return true if all required fields are present, false otherwise.
 */
function validate(errorMessage){
    var reqd = new Array("user", "fname", "lname", "company", "email");
    for (i in reqd) {
        if (!document.forms["registration"][reqd[i]].value.match(/.+/)) {
            alert(errorMessage);
            setTimeout("focusElement('registration', '" + reqd[i] + "')", 0);
            return false;
        }
    }
    if (!echeck(document.forms["registration"]["email"].value)) {
        setTimeout("focusElement('registration', 'email')", 0);
        return false;
    }
    return true;
}

/**
 * Moves focus to a specific element within a specified form. Allows us to put
 * the cursor back to any fields that are missing.
 *
 * @param formName
 *            the form containing the field we want focused.
 * @param elemName
 *            the name of the field we want focused
 * @return nothing
 */
function focusElement(formName, elemName){
    var elem = document.forms[formName].elements[elemName];
    elem.focus();
    elem.select();
}

/**
 * DHTML email validation script. Courtesy of SmartWebby.com
 * (http://www.smartwebby.com/dhtml/)
 */
function echeck(str){
    var at = "@";
    var dot = ".";
    var lat = str.indexOf(at);
    var lstr = str.length;
    var ldot = str.indexOf(dot);
    var valid = true;
    
    if (str.indexOf(at) == -1) {
        valid = false;
    }
    
    indexOfAt = str.indexOf(at);
    if (indexOfAt == -1 || indexOfAt == 0 || indexOfAt == lstr) {
        valid = false;
    }
    
    indexOfDot = str.indexOf(dot);
    if (indexOfDot == -1 || indexOfDot == 0 || indexOfDot == lstr) {
        valid = false;
    }
    
    if (str.indexOf(at, (lat + 1)) != -1) {
        valid = false;
    }
    
    if (str.substring(lat - 1, lat) == dot ||
    str.substring(lat + 1, lat + 2) == dot) {
        valid = false;
    }
    
    if (str.indexOf(dot, (lat + 2)) == -1) {
        valid = false;
    }
    
    if (str.indexOf(" ") != -1) {
        valid = false;
    }
    
    if (valid == false) {
        alert("Invalid E-mail ID")
    }
    
    return valid;
}