Javascript HTML Engelleme Fonksiyonu

            function htmlv4(text) {
              return text
                  .replace(/&/g, "&")
                  .replace(/</g, "&lt;")
                  .replace(/>/g, "&gt;")
                  .replace(/"/g, "&quot;")
                  .replace(/'/g, "&#039;");
            }

<script type="text/javascript">
function htmlv4(text) {
              return text
                  .replace(/&/g, "&amp;")
                  .replace(/</g, "&lt;")
                  .replace(/>/g, "&gt;")
                  .replace(/"/g, "&quot;")
                  .replace(/'/g, "&#039;");
            }
            
            var yazi = '<h1>v4r1able</h1>';
            var html_sil = htmlv4(yazi);
            document.write(html_sil);
</script>