/******************************************************************************
*  common.js
* 	
*   Manage cookies to simulate sessions. This allows us to set cookies upon 
*   start of the application and read from them as we go along.
******************************************************************************/

/*
* Set GLOBAL variables
*/
// this value can be set to seconds, minutes, or days
var TIMEOUT_INTERVAL = "minutes";
var COOKIES_ENABLED = false;

/*
* Set a cookie in memory. expires, path, domain, and secure are optional.
*/
function setCookie(name, value, expires, path, domain, secure) {
    // set time, in milliseconds
    var today = new Date();
    today.setTime(today.getTime());

    // convert to the desired time format...
    if (expires) {
        if (TIMEOUT_INTERVAL == "seconds") {
            expires = expires * 1000;
        } else if (TIMEOUT_INTERVAL == "minutes") {
            expires = expires * 1000 * 60;
        } else if (TIMEOUT_INTERVAL == "hours") {
            expires = expires * 1000 * 60 * 60;
        } else if (TIMEOUT_INTERVAL == "days") {
            expires = expires * 1000 * 60 * 60 * 24;
        }
    }
    var expires_date = new Date(today.getTime() + (expires));

    document.cookie = name + "=" + escape(value) +
    ((expires) ? ";expires=" + expires_date.toGMTString() : "") +
    ((path) ? ";path=" + path : "") +
    ((domain) ? ";domain=" + domain : "") +
    ((secure) ? ";secure" : "");
}

/*
* Get a cookie stored in "memory" by name.
*/
function getCookie(name) {
    var start = document.cookie.indexOf(name + "=");
    var len = start + name.length + 1;

    // check to make sure that the cookie requested exists first....
    if ((!start) && (name != document.cookie.substring(0, name.length))) { return null; }
    if (start == -1) { return null; }

    var end = document.cookie.indexOf(";", len);
    if (end == -1) { end = document.cookie.length; }

    // return the value of the cookie...
    return unescape(document.cookie.substring(len, end));
}

/*
* Delete a cookie. path and domain are optional.
*/
function deleteCookie(name, path, domain) {
    if (getCookie(name)) document.cookie = name + "=" +
    ((path) ? ";path=" + path : "") +
    ((domain) ? ";domain=" + domain : "") +
    ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
}

/*
* Attempt to set a cookie and set the global variable COOKIES_ENABLED to true
*/
setCookie("testEnabled", "someVal", 1);
if (getCookie("testEnabled")) { COOKIES_ENABLED = true; };

/*
* Open a window with no toolbars....
*/
function openEmailWindow(url, name, width, height) {
    window.open(url + '?u=' + location.href, name, 'location=0,status=0,scrollbars=1,resize=0,width=' + width + ',height=' + height);
}

function linklistOnClick(pageid, controlid) {

    var strSelectName = "list_" + pageid + "_" + controlid;
    if (document.all)		// IE
    {

        if (window.document.all(strSelectName).selectedIndex == -1)
            alert("Please select a value from the list");
        else {
            url = window.document.all(strSelectName).value;
            window.location.href = url;
        }
    }
    else {

        var refItem = eval("document.forms.aspnetForm." + strSelectName);

        var iSelection = refItem.selectedIndex;
        if (iSelection == -1)
            alert("Please select a value from the list");
        else {
            url = refItem.options[iSelection].value;
            window.location.href = url;
        }
    }
}


//STRING BUILDER
// Initializes a new instance of the StringBuilder class
// and appends the given value if supplied
function StringBuilder(value) {
    this.strings = new Array("");
    this.append(value);
}

// Appends the given value to the end of this instance.
StringBuilder.prototype.append = function(value) {
    if (value) {
        this.strings.push(value);
    }
}

// Clears the string buffer
StringBuilder.prototype.clear = function() {
    this.strings.length = 1;
}

// Converts this instance to a String.
StringBuilder.prototype.toString = function() {
    return this.strings.join("");
}