function safetitle() {

    var title = document.getElementById("section_title").value.toLowerCase();
    
    var url_name = "";

    url_name = title.replace(/\s+/g, "-");
    url_name = url_name.replace(/[^a-z0-9\-]/gi, "");

    document.getElementById("section_url_name").value = url_name;
    
  }