var mess = new Array('<video width="320" height="190" controls=controls poster="Video/Intro_180.png"> <source src="Video/Splav_Moravy_180.mp4" type="video/mp4" /></video>','<video width="320" height="190" controls=controls poster="Video/Intro_180.png"> <source src="Video/Splav_Maleho_Dunaja_180.mp4" type="video/mp4" /> </video>');
var max = mess.length;
var num = Math.floor((Math.random() * max));
document.writeln(mess[num]);