pelletalexandre

Hi

You can do this like that

it only accepts letters and numbers

regards

jQuery(document).ready( function () {

jQuery("#username").on("input", function(){
        var regexp = /[^a-zA-Z0-9]/g;
        if($(this).val().match(regexp)){
          $(this).val( $(this).val().replace(regexp,'') );
        }
      });
} );