function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}

var CAS_MediaFormat = readCookie('CAS_MediaFormat');
//alert('CAS_MediaFormat='+CAS_MediaFormat);
if (!CAS_MediaFormat) {
	 createCookie('CAS_MediaFormat','flash',365); //name,value,days
	 CAS_MediaFormat = 'flash';
}

// uses prototype.js AJAX
function CAS_loadMediaOptions(theID) {
	new Ajax.Updater('mediaoptions', 'cas_mediaoptions.php', { method: 'post', parameters: 'MediaID='+theID });
	new Ajax.Updater('mediaplayer', 'cas_mediaplayer.php', { method: 'post', parameters: 'MediaID='+theID+'&MediaFormat='+CAS_MediaFormat });
}

function CAS_loadMediaPlayer(theID, theFormat) {
	// save new selected format as default
	createCookie('CAS_MediaFormat',theFormat,365); //name,value,days
	new Ajax.Updater('mediaplayer', 'cas_mediaplayer2.php', { method: 'post', parameters: 'MediaID='+theID+'&MediaFormat='+theFormat });
}

function CAS_initDownload (theID, theFormat) {
	new Ajax.Updater('mediadownload', 'cas_mediadownload.php', { method: 'post', parameters: 'MediaID='+theID+'&MediaFormat='+theFormat });
}