function greyBars() {
    if(document.getElementById) {
        var table = document.getElementById('phrases');
        var tableRows = table.getElementsByTagName('tr');
        var f = 0;
        for (i=0;i<tableRows.length;i++) {
            if ( tableRows[i].className == 'headings' ) {
                f = 0;
            }
            if ( tableRows[i].className != 'headings' &&
                 tableRows[i].className != 'heading' ) {
                f++;
                if (f % 2 == 0) {
                    tableRows[i].style.backgroundColor = '#DCD6B5';
                }
            }
        }
    }
}