PRASHANTH  K CH
Tera Expert
    //Get Sys ID for current session Record
    automationsysid: function() {
        var sysId = this.getParameter('sysparm_sys_id');
        gs.info('sysparm_sys_id---' + sysId);
        gs.getSession().putClientData("AutomateITID", sysId);
        return sysId + '';
    },


UI action script

function submitrequest() {
    var currentSysId = g_form.getUniqueValue();
    var ga = new GlideAjax('script include name');
    ga.addParam('sysparm_name', 'function name');
    ga.addParam('sysparm_sys_id', currentSysId);
    ga.getXMLAnswer(function(response) {
        var automationSysId = response;

        var dialog = new GlideDialogForm('prompt_modal', 'com.glideapp.servicecatalog_cat_item_view');
        dialog.setTitle('');
        dialog.addParm('sysparm_id', 'item sysID');
        dialog.addParm('sysparm_sys_id', currentSysId);
        dialog.addParm('preview', 'true');
        dialog.setDialogWidth(800);
        dialog.setDialogHeight(350);
        dialog.render();
    });
}




create on load catalog client script

  var ur_sysid=g_user.getClientData("AutomateITID");
  g_form.setValue('univ_rec',ur_sysid);

}