<script>
var secTimeOut = 3;
function rand( min, max ) {    // Generate a random integer
    // 
    // +   original by: Leslie Hoare
 
    if( max ) {
        return Math.floor(Math.random() * (max - min + 1)) + min;
    } else {
        return Math.floor(Math.random() * (min + 1));
    }
}

function redir(link){
   location.href = link;
}

var linkArray = ["link1", "link2", "link3"];

setTimeOut("redir(linkArray[rand(0,(linkArray.length-1))])", 1000*secTimeOut);
</script>