function get_random_color() 
{
    var color = "";
    for(var i = 0; i < 3; i++) {
        var sub = Math.floor(Math.random() * 256).toString(16);
        color += (sub.length == 1 ? "0" + sub : sub);
    }
    return "#" + color;
}

function get_rand_color()
{
    var color = Math.floor(Math.random() * Math.pow(256, 3)).toString(16);
    while(color.length < 6) {
        color = "0" + color;
    }
    return "#" + color;
}