How to use the catalog.gxe.dialog.mode.edit function in catalog

var handleError = function (sError) {
            oWorking.hide();
            oThis._showErrorDialog(oThis.i18n["catalog.gxe.dialog.mode.edit"], sError);
        };

var elViewTools = document.createElement("div");
        elViewTools.id = "gxeViewModeTools";
        elViewTools.style.display = "inline";
        elControlBar.appendChild(elViewTools);
        addMode(elViewTools, "view", this.i18n["catalog.gxe.dialog.mode.view"], true);
        addMode(elViewTools, "xml", this.i18n["catalog.gxe.dialog.mode.xml"], false);

        if (this.canEdit) {

            elSep = document.createElement("span");
            elSep.className = "gxeButtonSeparator";
            elViewTools.appendChild(elSep);

            elButton = document.createElement("button");
            elButton.className = "gxeButton gxeButton-enabled";
            elButton.appendChild(document.createTextNode(this.i18n["catalog.gxe.dialog.mode.edit"]));
            elViewTools.appendChild(elButton);
            dojo.connect(elButton, "onclick", this, dojo.hitch(this, function (e) {
                this._changeMode("edit");
            }));

            var elEditTools = document.createElement("div");
            elEditTools.id = "gxeEditModeTools";
            dojo.style(elEditTools, { display: "none" });
            elControlBar.appendChild(elEditTools);

            elButton = document.createElement("button");
            elButton.className = "gxeButton gxeButton-enabled";
            elButton.appendChild(document.createTextNode(this.i18n["catalog.gxe.dialog.load"]));
            elEditTools.appendChild(elButton);
            dojo.connect(elButton, "onclick", this, dojo.hitch(this, function (e) {
                this._showLoadDialog();