/**
 * 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";
    }
}


/**
 * Checks cookies for Flash plugin & bandwidth settings
 *
 * p       relative path to video and flash checker
 * fn      file name of content page to open
 * w, h    dimensions of window to open
 */
function popupFlash(p,fn,w,h,flashMinVer)
{
	// m@|20040222 multi-version flashchecker;
	if (flashMinVer)	{// does this var exist
		if (flashMinVer == 0)	{
			DoFlashTest = false;
			url = fn;
		} else {
			DoFlashTest = true;
		}
		
	} else {//legacy function calls that don't include the new param : EARTH
		DoFlashTest = true;
		flashMinVer = 7;
	}

	if (DoFlashTest)	{//m@:20040422
		// SG|20040421: fix bulletin_type test...
		//	(location.href.indexOf('/sciencebulletins/astro/')) is always true except when string is "/astro/..."
		if (location.href.indexOf('/sciencebulletins/astro/')>=0)	{
			bulletin_type = 'astro';
		} 
		else if (location.href.indexOf('/sciencebulletins/bio/')>=0)	{
			bulletin_type = 'bio';
		} 
		else if (location.href.indexOf('/sciencebulletins/earth/')>=0)	{
			bulletin_type = 'earth';
		} 
	    url = "";
	    fcookie = getCookie("haveflash");
		// SG|20040421: temporary fix for handling hand-built Earth pages vs. template-built Astro
	    if (fcookie==null)
	    {
	        url=p + "checkFlash.php?c="+fn + '&bulletin_type=' + bulletin_type + "&flashMinVer=" + flashMinVer; // m@:20040422: added New Variable
	    } else {
	        url=p + fn;
	    }
	}
    params = "width=" + w + ",height=" + h + ",menubar=no,scrollbars=no,toolbar=no,status=no,location=no,directories=no,hotkeys=no";
	winname = "flash" + w.toString() + h.toString() ;
    flashWin = open(url,winname,params);
    flashWin.focus();
}

function openAltText() {
	// SG|20051007: if not already open, open alternate text description in new, full-featured window, and close pop-up
	if (self.name!='alt_text') {
		open("alt_text.php","alt_text");
		self.close();
	} else {
		self.location.href="alt_text.php";
	}
}