[jQuery] interface Slider IE problem

[jQuery] interface Slider IE problem


Im using the interface plugin to change the speed of a timeout (that
the function call it again)
I follow this example to do mine: http://interface.eyecon.ro/demos/slider.html
In Firefox2 works perfect, but IE shows me an error: "The object does
not accept that property or method" (im translating)
the html:
Speed:<label id="label_speed">5 seconds</label>
<div id="slider"><div class="indicator"></div></div>
the javascript:
    $("#slider").Slider({
        accept: ".indicator",
        fractions: 4,
        restricted: true,
        onChange: function( cordx, cordy, x , y)
        {
            changespeed(cordx);
        },
        values: [
            [138,138]
        ]
    });
});
function changespeed(cordx) {
    switch (cordx) {
        case 0:
            speed = 3;
        break;
        case 25:
            speed = 4;
        break;
        case 50:
            speed = 5;
        break;
        case 75:
            speed = 6;
        break;
        case 100:
            speed = 7;
        break;
    }
    $("#label_speed").html(speed +" seconds");
};
Someone can help me ?
Thanks