/**
@param string rowid the id o fthe row you want to make disappear
@param oject  opts  Effect options such as {duration:3}
*/
function fadeTableRow(rowid,opts){
    if(!opts){
        opts = {};
    }
    var row  = $(rowid);
    var cells= row.childNodes;
    for(i=0;i<cells.length;i++){
        if(cells[i].tagName == 'TD'){
            new Effect.Fade(cells[i],opts);
        }
    }
    new Effect.Fade(row,opts);
}