function alternateTableColor() {

    var colorTables = document.getElementsByTagName('table');

    for (i=0; i< colorTables.length; i++) {

        var colorTable = colorTables[i] ;

        var name = colorTable.getAttribute('name') ;

        if (name == 'table.alternate.color') {

            var tBodyArray = colorTable.getElementsByTagName('TBODY');

            var tBody = tBodyArray[0] ;

            var tableRows = tBody.childNodes ;

            var alternateCounter = 0 ;

            for (rowindex=0; rowindex < tableRows.length; rowindex++ ) {

                var row = tableRows[rowindex] ;

                if (row.tagName != 'TR' ) {

                    continue ;

                }

                if ( row.className == "" ) {

                    if (i % 2 == 0 )

                        row.className = "table-row-background-A" ;

                    else 

                        row.className = "table-row-background-B" ;

                }

            }

        }

    }

}