var Anzahl = 03
Spruch = new Array(Anzahl);

Spruch[01] = "<img src=\"fileadmin/img/teaser-home-01.png\" width=\"930\" height=\"175\" />"
Spruch[02] = "<img src=\"fileadmin/img/teaser-home-02.png\" width=\"930\" height=\"175\" />"
Spruch[03] = "<img src=\"fileadmin/img/teaser-home-03.png\" width=\"930\" height=\"175\" />";

var Zufall = Math.random()
var Zufall = Math.round((Anzahl-1) * Zufall) + 1

document.write(Spruch[Zufall])