var volume=-1;
function setCookie(){
	var exdate=new Date();
	exdate.setDate(exdate.getDate()+60); // expires in 60 days
	document.cookie="volume="+volume+";expires="+exdate.toGMTString();
}
function getCookie()
{
	if (document.cookie.length>0){
		var c_start=document.cookie.indexOf("volume=");
		if (c_start!=-1){
			c_start+=7;
			var c_end=document.cookie.indexOf(";",c_start);
			if (c_end==-1) c_end=document.cookie.length;
			volume=1.0*document.cookie.substring(c_start,c_end);
		}
	}
	if (volume == -1)
		volume=60;
}
function getVolume()
{
	if (volume == -1)
		getCookie();
	return volume;
}
function setVolume(v){
	volume=v;
	setCookie();
}