function toggleRows(tableId, tr_on, tr_off){
        var ajax_hide_objects = new Array();

        tbl = document.getElementById(tableId);
        td = tbl.rows[0].cells[0];
        var len = tbl.rows.length;
        hidden = td.className;

        if(hidden == "td1"){
                var hide = true;
        }
        else
                var hide = false;

        var vStyle = (hide)? "none":"";

        for(i=1 ; i< len; i++){
                 tbl.rows[i].style.display = vStyle;
        }

        if(hide){
                td.innerHTML = tr_off;
                td.title = "Click To Expand";
                td.className = "td2";
                var toggle = "off";
        }
        else{
                td.innerHTML = tr_on;
                td.title = "Click To Collapse";
                td.className = "td1";
                var toggle = "on";
        }

        var ajaxIndex = ajax_hide_objects.length;
        var url = "../ajax-hide.php?tableid=" + tableId + "&toggle=" + toggle;

        ajax_hide_objects[ajaxIndex] = new sack();
        ajax_hide_objects[ajaxIndex].requestFile = url; // Specifying which file to get
        //ajax_hide_objects[ajaxIndex].onCompletion = "good";
        ajax_hide_objects[ajaxIndex].runAJAX(); // Execute AJAX function
}