var top = document;
var texta2number = 4;
var randoma2number = Math.random();
var rand1a2 = Math.round( (texta2number-1) * randoma2number) + 1;
texta2 = new Array
texta2[1] = '';
texta2[2] = '
';
texta2[3] = '
';
texta2[4] = '
';
var mytexta2 = texta2[rand1a2];
top.write(mytexta2);