/**
 * Read the JavaScript cookies tutorial at:
 *   http://www.netspade.com/articles/javascript/cookies.xml
 */

/**
 * Sets a Cookie with the given name and value.
 *
 * name       Name of the cookie
 * value      Value of the cookie
 * [expires]  Expiration date of the cookie (default: end of current session)
 * [path]     Path where the cookie is valid (default: path of calling document)
 * [domain]   Domain where the cookie is valid
 *              (default: domain of calling document)
 * [secure]   Boolean value indicating if the cookie transmission requires a
 *              secure transmission
 */
function setCookie(name, value, expires, path, domain, secure)
{
    document.cookie= name + "=" + escape(value) +
        ((expires) ? "; expires=" + expires.toGMTString() : "") +
        ((path) ? "; path=" + path : "") +
        ((domain) ? "; domain=" + domain : "") +
        ((secure) ? "; secure" : "");
}

/**
 * Gets the value of the specified cookie.
 *
 * name  Name of the desired cookie.
 *
 * Returns a string containing value of specified cookie,
 *   or null if cookie does not exist.
 */
function getCookie(name)
{
    var dc = document.cookie;
    var prefix = name + "=";
    var begin = dc.indexOf("; " + prefix);
    if (begin == -1)
    {
        begin = dc.indexOf(prefix);
        if (begin != 0) return null;
    }
    else
    {
        begin += 2;
    }
    var end = document.cookie.indexOf(";", begin);
    if (end == -1)
    {
        end = dc.length;
    }
    return unescape(dc.substring(begin + prefix.length, end));
}

/**
 * Deletes the specified cookie.
 *
 * name      name of the cookie
 * [path]    path of the cookie (must be same as path used to create cookie)
 * [domain]  domain of the cookie (must be same as domain used to create cookie)
 */
function deleteCookie(name, path, domain)
{
    if (getCookie(name))
    {
        document.cookie = name + "=" + 
            ((path) ? "; path=" + path : "") +
            ((domain) ? "; domain=" + domain : "") +
            "; expires=Thu, 01-Jan-70 00:00:01 GMT";
    }
}

function zFill(id)
{
	while(id.length < 10) id = "0" + id;
	return id;
}

function UpdateSL(id, add)
{
	id = zFill(id);
	var cookieval = getCookie("ojsshort");
	if(add)
	{
		if(!cookieval) cookieval = new String('');
		if(cookieval.indexOf(id) < 0) 
		{
			if(cookieval.length == 0) cookieval = id;
			else cookieval = cookieval + "," + id;
		}
	}
	else 
	{
		
		if(cookieval)
		{
			if(cookieval.indexOf(id) == 0) 
			{
				var regexp = new RegExp(id + ",?", '');
				cookieval = cookieval.replace(regexp, "");
 			}
			else 
			{
				var regexp = new RegExp("," + id);
				cookieval = (cookieval.replace(regexp, ""));
			}
		}
		else return;
	}
	
	expires = new Date();
	iMonth = expires.getMonth();
	if(iMonth == 12) {
		expires.setMonth(1);
		expires.setYear(d.Year() + 1);
	}
	else expires.setMonth(iMonth + 1);
	
	setCookie("ojsshort", cookieval, expires);
}

/**
 * Update ShortList from Display Job. Called by both link and checkbox, to set the values of
 * all checkboxes on the page, + update the actual shortlist. If the passed in is -1 then
 * we use the checkbox val, invert it, else we use the val we are set.
 */
function UpdateSLFromDispJob(id, checkbox, val) {
	var doneUpdate = 0;
	var isChecked = val;
	for(var i =0; i < document.forms.length; i++)
	{
		if(document.forms[i][checkbox])
		{
			if(!doneUpdate)
			{
				if(val == -1) isChecked = !document.forms[i][checkbox].checked;
				UpdateSL(id, isChecked);
				doneUpdate = 1;
			}	
			document.forms[i][checkbox].checked = isChecked;
		}
	}
}