function text() {
};

text = new text();
number = 0;

text[number++] = "<link href='css/gardener.css' rel='stylesheet' type='text/css'>"
text[number++] = "<link href='css/hipster.css' rel='stylesheet' type='text/css'>"
// keep adding items here...

increment = Math.floor(Math.random() * number);
document.write(text[increment]);