SMART datagrid v.1 > Classes > DisplayOptions
RowHoverMask object which sets the mask of separating data rows under the mouse. 
If set as boolean value, it means to change visible property of object.
    grid.setOptions({
        display: {
            rowHeight: 25,
            rowHoverMask: {
                visible: true,
                styles: {
                    background: "#20ff0000"
                }
            }
        }
    });
    // or, change visible property only by boolean value.
    grid.setOptions({
        display: {
            rowHeight: 25,
            rowHoverMask: true
        }
    });
    
    grid.setDisplayOptions({
        rowHoverMask: {
            visible: true,
            styles: {
                background: "#20ff0000"
            }
        }
    });
    // or, change visible property only by boolean value.
    grid.setDisplayOptions({
        rowHoverMask: true
    });    
    grid.displayOptions().setRowHoverMask({
        visible: true,
        styles: {
            background: "#20ff0000"
        }
    };
    // or, change visible property only by boolean value.
    grid.displayOptions().setRowHoverMask(true);