I try to set the TableView background as transparent, OK, it works, then I try to set all the TableViewRow's opacity in that TableView, but looks like opacity for TableViewRow lost controll? Man can not set this property anymore? Somebody could help? thx!

var menu_list_data = [];

    menu_list_data[0] = Ti.UI.createTableViewSection({
        headerTitle:''
    });

    for (var x=0;x<7;x++)
    {
        var temp_row = Ti.UI.createTableViewRow({
            title:'menu '+x,
            color:'#000',
            backgroundColor:'#E0FFFF',
                        opacity:0.8


        });
        menu_list_data[0].add(temp_row);
    }

    this.win_menulist = Titanium.UI.createWindow({  
        height:'100%'

    });

    var tableview = Titanium.UI.createTableView({

        data:menu_list_data,
        style: Titanium.UI.iPhone.TableViewStyle.GROUPED,
        backgroundColor:'transparent',
        height:'100%'

    });

    this.win_menulist.add(tableview);