var keys =plid + ","+time+",feda8dd6e0127da88f3487a646fe8a6b";
var time = (new Date()).getTime().toString().substr(0, 10);
var pp = "vjs_"+(new Date()).getTime().toString();
plid 是 cctv1HD_1800，time 是实时时间
cctv1HD 不带_1800是默认最高清的，所以最好不带
				keys = md5(keys);
				plus ="";
				apiurl ="http://live.gslb.letv.com/gslb?tag=live&ext=m3u8&stream_id=" + plid +"&expect=3&termid=2&pay=0&ostype=macos&hwtype=ipad&sign=live_phone&format=1&jsonp="+pp+"&platid=10&playid=1&splatid=1005&tm="+time+"&key="+keys+"&_r=0";