I'm using the gRaphael linechart plugin, and I would like to be able to change my hover tags to hover only for individual lines, not all lines at the same time.

The reason is because I have an invisible line that I don't want users to see, but it's set to a value of 0 so the y axis always starts at 0. If I set the tags to appear upon hover, I also see the tags for the invisible line. I want to set it so that the invisible line doesn't have any hover tags.

Here's what I have:
var lines = r.g.linechart(
    40, //x start
    0, //y start
    chartWidth, //width
    300, //height of chart in pixels
    datesCount, //amount of x coordinates
    [invisibleLine, locationViews, locationClicks], //array of y coordinates
        nostroke: false,
        axis: "0 0 1 1",
        axisxstep: rows-1,//how many x interval labels to render
        symbol: "o",
        colors: ["transparent", "#BE6228", "#33312F", "#66625E", "#BFBDBB", "#E79645"]
        //adds hover tags
        this.tags = r.set();
        for (var i = 0, ii = this.y.length; i < ii; i++) {
            this.tags.push(r.g.tag(this.x, this.y[i], this.values[i], 175, 0).insertBefore(this).attr([{fill: "#fff"}, {fill: this.symbols[i].attr("fill")}]));
    }, function () {
        //removes hover tags
        this.tags && this.tags.remove();
Thanks for any help!