How to you change a gridview rows background color for chrome

I am using vb.net.
I have a gridview with a checkbox in column 0. When the checkbox is selected it fires a script that changes the background color of the row. It works fine in internet explore but not in chrome. I set the checkboxes onclick in the gridview's rowdatabound event. Here is my script code
<script type="text/javascript">
    //variable that will store the current color of the selected row
    var RowColor;
    function ChangeRowColor(row) {
        //get the color of the selecte row
        RowColor = document.getElementById(row).currentStyle.backgroundColor;
        // if current color is white then change it to blue
       if (RowColor == "#ffffff") {
            // change the color to blue
           document.getElementById(row).style.backgroundColor = "#3399FF";
        }
        // if current color is white then change it to blue  
        else if (RowColor == "white") {
        document.getElementById(row).style.backgroundColor = "#3399FF";
        }
        else
        //  current color is blue then change it to white
        {
            document.getElementById(row).style.backgroundColor = "#ffffff";


        }
    }
     </script>

How do I get this to work in chrome?