# A Line chart with alert() warnings prevented

This is a standard Line chart and the page also redefines the `alert()` function so that there are no warnings displayed. You simply need to redefine the `alert()` function before you create the chart.

    alert = function (str)
    {
        console.log(str);
    }

This goes in the documents header:

    <script src="RGraph.common.core.js"></script>
    <script src="RGraph.line.js"></script>

Put this where you want the chart to show up:

    <canvas id="cvs" width="600" height="250">
        [No canvas support]
    </canvas>

This is the code that generates the chart - it should be placed AFTER the canvas tag(s):